How to Regulate a Seiko Automatic Watch - 7s26, 4r36, and 6r15 Seiko Movements

How to Regulate an Automatic Watch on the JustBlueFish KZbin channel, home of high quality wristwatch and horology related reviews and videos.
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You're probably a watch collector and enthusaist like myself and want your automatic and mechanical watches to be as accurate as possible. If so here is a tutorial on how to regulate an automatic or mechanical watch and get the best accuracy possible. Below are a list of the tools I used with links to purchase through my Amazon affiliate account.
Weishi Timegrapher on Amazon:
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Jaxa Case Back Opener:
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Watch Case Holder:
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Magnifier Visor:
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Toothpicks:
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Video Production Information
Filmed with Sony HDR CX440:
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Camera Tripod:
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Studio Lighting Package:
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Audio Recording Lav Microphone:
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[@feardabeard7635]

I must have really gotten lucky with my 7S26 movement. It's 20 years old and never serviced, Been on several deployments all over the world and never leaves my wrist. It might loose about 2-5 seconds a week. I'm no watch expert but all the videos I've seen that's pretty damn good.

[@7yaya754]

This video is one of the best ones for setting a watch. First, set beat error ! Many videos on the net say not to touch this, and they are wrong. Beat error must be as close as possible to zero ( for me, 0.5 ms is the maximum allowed, and anything between 0.0 and 0.2 ms is fine ). The problem is that there are no indications of the direction to take to modify the lever position ! So you need patience and repeated testing before tuning it right. Then, secondly, go to the other lever to regulate speed, this is easier because of the indications + or -, or A and R ( Avance Retard ) or F and W ( Fast or Slow ). All this must be done with frequent back and forth operations to the timegrapher. What the tuto does not say is that all this must be done on at least two or three positions of the movement ( horizontal and vertical ). Therefore fine tuning of a mechanical watch fitted with the two levers can be a rather "long" work, but worth it. My only criticism to this video is that images are sometimes not perfect, but this is a minor problem : it is done with intelligence, that's what counts ! Congratulations !

[@WatchGeek]

Great video. I used to do this with my Monster but without the timegrapher which was VERY difficult. I ended up messing up the time completely, so I gave up and took it to my watchmaker, he LITERALLY took one minute to regulate it. He gave it back to me said it should be within a couple of seconds a day, and didn't charge me anything. The watch was +1 second a day until I sold it. In a month, I took all my watches to him and asked if he would be willing to do it for them, but this time to charge me. He laughed and agreed on the price of about one coffee per regulation 😃

[@JustBlueFish]

Thanks for watching. I can't imagine doing it without a timegrapher. It would take forever, testing the timekeeping after every adjustment over the course of days and days. That said buying a timegrapher is totally worth it if you're a watch collector and it's pretty easy to regulate these watches on your own.

[@SumD-EGuy]

Watch Geek man what an awesome watchmaker.

[@code6400]

I want your watch sevice guy!!

[@edloki3057]

Who is your watchmaker? Mine sucks. +10 secs is acceptable to him and charged me $50.

Honest watch maker! Also you're famous lol

[@SirBeauJangles]

On an elderly 7009 movement I made my adjustments by ultra-light "tappings" on the little lever rather than actually pushing it. With pushing, you need to overcome the slight stiction of the lever's friction, leading to it letting go and allowing too much travel. These tiny taps moved it so little that I was convinced I wasn't moving it all. Don't have a timer as per your demo so I was doing it the prehistoric way by setting and observing the result. Takes time, and lots of patience..

[@JustBlueFish]

Thanks for watching.

[@jacc88888]

I might try that technique!

[@bl00dline360]

Man said the prehistoric way 😅😅

[@mbigras]

Excellent video! The pace and conversational style were very enjoyable. Also thank you for taking the time to get your camera angles dialed in, the visibility was definitely good enough to get a sense of your technique.

[@BJL1970]

Thanks. This helped first time I did this to a NH35A. I learned the hard way to have one of my 5 positions be -1 or -2 spd and the others be +.

[@camarocarl7130]

Thanks so much for this instructional video. Your attention to detail and calm concise steps are so much better than the other watch/ used car sales men techniques used by other " experts " / internet watch sales men, that post watch information videos. Well done and again, many thanks.

[@JustWatches1]

Excellent video! You have described the process so clearly that now I want to get a timegrapher and try this!

[@Imustfly]

Really well done sir ! You did a bang up job, taking your time to explain small tangental subjects and then bringing us back for the meat and potatoes !! Super informative and I wouldn't hesitate for a second (pun intended) in doing this myself after watching this !!

[@JustBlueFish]

Thanks buddy I appreciate it.

[@benlait3696]

A very well done tutorial by far the best I've seen. I like how particular you are with everything. I feel confident to try this myself now.

[@JustBlueFish]

Thanks Ben. Give it a shot, you can do it. Just be careful around the hairspring.

[@benlait3696]

Thanks Guy I'll look out for timegrapher on ebay and give it a go. 👍

[@ToddNewberg]

Thanks so much for this vid. Just regulated my SRP779 from +51 s/d to +5 s/d, beat error +11 to 0.7

[@musmustafa7900]

You have a new sub! that was a very thorough well explained tutorial. I have all the last tools arrive today and now going to attempt to regulate with confidence, This is the second time watching and the third time will be during regulating..

[@vanveenmatt]

Thanks for the info! Very helpful!

[@JustBlueFish]

Glad it was helpful!

[@nickkorovesis4930]

Fantastic tutorial. You have the ability to pass knowledge thoroughly and crystal clear like a highly regarded tutor. It's a pleasure to watch your video productions and follow your detailed guidance on the bench. Amateur horology is a very interesting hobby and I'm glad that there are people like you that inspire us and give us the motivation to keep going and further delve into the complicated wonderland of the mechanical watch craftmanship! Thank you so much.

[@JustBlueFish]

Thanks Nick I appreciate the feedback. I hope you found the video useful.

[@22Phanatic]

Excellent, enjoyed that quite a bit ! Getting a Timegrapher ! Thanx

[@JustBlueFish]

Awesome glad to have helped.

[@andrewfitzgibbons3492]

Brilliant vid loved it so informative I have the seiko 53kx 4r36 movement and this vid educated me on how the regulation works brilliant I know how the watch works and this vid makes the regulation of the time make perfect sense as a result I have subscribed to the channel.

[@jimt7292]

thank you philodendron! This video - if nothing else - provided a greater understanding how to regulate a 007/09 - appreciate it!

[@JustBlueFish]

Thanks for watching.

[@mrp9498]

I just got a Timegrapher and this video will be very helpful as I have 2 Seikos I need to regulate. Wish me luck it’s my first try. Thanks so much 👍🏼

[@ats7485]

A friend of mine and his more experienced brother were digging a ditch to get the right grade for laying a sewer pipe. At one point, my friend said, "There. That should be good enough." His brother replied, "No. If we settle for 'good enough,' it will not work quite like it could. If we do the very best that we can do with it, it still won't be perfect but then it will be good enough." This video reminded me of that story. I may give regulating a try.

[@JustBlueFish]

Nice story thanks for sharing. I really recommend having a timegrapher in the arsenal, even if only to check watches for quality and accuracy when you get something new.

[@marcosmunozdomon9598]

I liked your story, very much. Thanks!

[@bunberrier]

In contrast to some other people who complained about it I found all the context and setup you provided to be very useful. I see now why I would not attempt this without a grapher, and I appreciate how my new 007 will need observation over a period of time.

[@Don18376793]

When I regulated my 7s26 I placed a small screwdriver on the other side of the adjustment arm so it acted as a stop, that way I could make tiny adjustments without worrying about going to far. It's running at +1 sec per day at the moment.

[@JustBlueFish]

Thanks for the suggestion I’ll try that next time.

[@nickkermode7071]

Trying this myself currently and it's pretty hard lol

[@Yakena1]

I know its been 4 years, but could you further explain how you use the screwdriver to allow micro adjustments? How is it placed? Thanks!

[@amenhotep7704]

Great video i truly enjoyed

[@raspberryminute]

I appreciate the detailed explanation!

[@light1531]

Got a three way watch back remover, used your method to just regulate time keeping, not the beat error, but using the stopwatch off an iphone, took the watch in two moves to plus 9 seconds per day from minus 90 seconds per day. Thanks.

[@JustBlueFish]

That’s solid. Good work. I’ve noticed with Seiko movements that will will fall out of regulation for seemingly no reason. So keep an eye on it.

[@ausmartin1]

You guys are amazing, I once did a minuscule beat adjustment on a 7S26C and it caused a noisy beat never to be recovered. Also for the hobbyist needing to replacement parts - Problems are you cannot buy genuine balance spring assemblies & escape levers so this watch is scrap and I've learnt to live with how they operate ex factory 🏭 and now just enjoy as is as you need way more watch making skills than a hobbyist could ever learn when unexpected things happen. So you that have skills & knowledge 👏 you are amazing!

[@PukaHeadMan]

Thank you for the regulating lesson!

[@TheTimekeeper]

Thanks! I managed to regulate my SNK393 to to +5 with a beat error of .1. It had a beat error of 2.5ms and was running at -36 after dropping it on the floor like a dope. It's more accurate now than before the drop. This was first attempt at regulating a watch and I just bought my new Weishi 1900 last week. So happy I bought it when I did.

[@robertbelliottjr5773]

EXCELLENT video. Thank you. Very informative.

[@diogeneslantern18]

Wonderful video! Regulating is so underrated for a 30min job

[@JustBlueFish]

Thanks I appreciate the feedback. I agree it's super easy and worth the minimal effort, I hope more people learn how to do it from this video and consider it for their watches.

[@josephpetranovic3450]

Thankyou for a great overall video ...very informative 👍

[@JustBlueFish]

Thanks for watching I appreciate it.

[@freebrotherlee]

Thank you!

[@CarloDimacali]

Hey man, thanks for the video, watched your video and Long island watch's video on regulating your watch. I don't have a time grapher and was planning to do it in minute increments and slowly adjust it over the next several weeks. But since you said that there are apps for measuring the beat, I decided to try it out. I managed to adjust it to -1 sec/day, I know that this won't be an accurate representation, at least I have an idea. So for the next week I'll try to keep a good record of how much I'm gaining or losing. Thanks for the video once again... Cheers!

[@JustBlueFish]

Nice, if it holds that time that's pretty fantastic. Good luck and thanks for watching.

[@JosephDietz]

great video, thanks

[@nortoncmd2681]

Great video, thank you

[@JustBlueFish]

Thanks for watching.

[@jfilm7466]

Thanks. Found a cheap watch that is running fast ​so I might give it a go! Cheers.

[@JustBlueFish]

Thanks for watching.

[@jefferyneu3915]

Well done! Your video is clear and complete. Now I know why I should never try this at home. 😬

[@JustBlueFish]

You can do it!

[@JB-fl2gp]

Great Video, thank you.

[@JustBlueFish]

Thanks for watching.

[@harrysmith3502]

Great video buddy!

[@gunterhofstotter8813]

GREAT VIDEO !!!! THANKS VERY INTERESTING

[@markyhundreds]

awesome video.

[@JustBlueFish]

Thanks I appreciate that.

[@nightowlandabibliophile]

i have my grandfather's seiko watch and i didnt wore it for how many years, but when i wore it today,it only move if i touch it but if not,it stops working.thanks for this video now i know what to do :)

[@LeeRaymondCM]

Great tutorial. I have a "5" with 7S26. I haven't worn it for quite a while and had just picked it up this week. It's off (ahead) by almost a minute a day and the lever as seen from the glass back, is quite close to the far end of the + sign already. I haven't ordered a time graph machine yet but an Android app shows that I'm in between +42s to +70s per day with beat error of 4ms. It's quite consistent with what I observed. I have some tools that can open the watch. I'll keep wearing the watch for another 2 weeks before starting to try calibrating it. Anyway, thanks!

[@MrOkieChef]

I must be the luckiest SOB in the hobby. I’ve built about three dozen watches (NH35 & NH36’s) and all of them kept good time, good enough for me anyway. Then I built one about a month ago and it was gaining about 10 minutes in 24 hours. People said it was beyond help but I figured I had nothing to lose so I opened the Watch up and noticed that the regulating tab/handle was all the way up in the go fast position so I adjusted using the seat of the pants method. I moved the tab clockwise just past the zero mark. I let it run for 24 hours and it was keeping perfect time. Saved myself about $150 on a timegrapher.

[@adventureswithtime]

Very informative video. I’m going to work on my Seiko samurai this weekend. I’ll make a video on my channel to document my experience

[@JustBlueFish]

It’s pretty easy, just don’t slip and bump the hairspring.

[@mings6744]

Thanks for the video. When I got my Vostok, out of the box it was gaining 30 seconds a day, which drove me nuts. I decided to get some (really cheap) tools and tried regulating it. Was surprisingly easy, considering I don't have a timegrapher. Took a couple days to find the best rate (with reference to the time on my phone), but I got it down to about +10s/day. I think it's something pretty easy that any watch enthusiast can do, just be a little careful and patient. Obviously I don't recommend opening up a Rolex, but if it's a Seiko 5, I think it's worth a try

[@JustBlueFish]

Thanks for watching. I’m impressed you did it with no timegrapher. That would be hard.

[@mings6744]

JustBlueFish well it did take me way longer. Also, I guess I'll never know what the rate actually is. Over a period of 6-7 days it gains a minute, good enough for me. Maybe I'll invest in a timegrapher one day. Cheers

[@ultimaetsolder]

Great tip on the electrical tape

[@neilpiper9889]

I have a hand wound Seagull St36 and it's reliably fast at plus 20. I have an Omega 266 from 1954 hand wound which is plus 5 sec per day. I have a Seiko 4r39a which is spot on. My F67 Orient Bambino V4 is +10 seconds per day whether I wear it or not.

[@JustBlueFish]

I think the Orient movement works the same way as the Seiko so that would be easy to regulate if you wanted. I don't know about the Seagull movement or the vintage Omega however.

[@jacc88888]

Most comprehensive tutorial I’ve seen on this subject. Thanks. Great you had a macro lens. I regulated one of my Seiko 5s’ 7s26 to within 2s a day a few months ago using the same timegrapher but now for some reason it is running 25s/d fast (I think shock must have moved the timing lever a bit). Annoying. Will try again using your flattened cocktail stick method - scary if you slip though. Shame there isn’t a tool that you can safely lock around the lever to prevent slipping though.

[@JustBlueFish]

My experience with these cheap Seiko movements is they do not hold timing. I’ve had the same experience as you. If I’m being honest I don’t think they are good movements and the idea that they are “reliable workhorse movements” is wildly inaccurate that has somehow become a commonly accepted truth. That said Seiko designs cool watches and they’re cheap, or at least they used to be, so it’s not a total loss - but I don’t invest my hard earned dollar in them anymore.

[@jacc88888]

JustBlueFish Watch Reviews Thanks for the reply. I think you’re right - certainly about the 7s26. I have had an Orient Star for 18 months and that has been very consistent in it’s timekeeping but the 7s26s seem outdated and basic. I have just bought a dive watch with the upgraded NH35 movement inside which so far after a month has been keeping excellent time so will be interesting to see if that goes off too.

[@AmcoAutoGlass]

i have several seikos regulated and for years still holding within 5s/day. So I dunno if Im just lucky with all my seikos over 10 or super lucky?

[@jacc88888]

Amco Auto Glass If you’ve regulated 10 and they’ve kept good time that’s pretty impressive! I think I’ll try and again and maybe adjust beat error first as that’s a bit out.

[@trackpackgt877]

My 7s36 use to run -30s a day consistently kinda slow but consistent but now its running-50 seconds slow a day and its only 2 years old I'm gonna have to regulate it myself or take it somewhere it's my everyday work watch wich I suspect has taken to many beatings at work. Now my newer 4r36 is running +7sec consistently way better than my old 7s36 I think the new movements are better so far. Great video

[@MiguelBricaBrac]

When adjusting the BE and R, I do it with the watch sitting on the time grapher. I make my gradual adjustments and let the beat settle for about 5 minutes then check results. Also make sure to always fully wind the movement before starting to make adjustments.

[@michaelsigman8942]

Best video on this I’ve seen. You know your stuff. Unrelatedly I think you have bad myopia like I do. My refraction is -10 in glasses. Very few ppl as bad as me. :(

[@ForbinColossus]

great vid, Guy - and it was two hard t believe it went that fast years ago. I have Seiko divers and Monsters and I am pissed off at Seiko QC - makes me look at Hamilton for a similarly priced alternative brand.

[@willianviana1646]

Very Nice vídeo

[@jackwright2033]

I really enjoyed learnt more about what is involved in getting your watch ready for regulating,than by reading about it. A very good interpretation of all that's involved in doing this adjustment. 5 Stars Sir

[@JustBlueFish]

Thanks Jack.

[@shaneweightman]

By the way great video, interesting ,, have you made a video explaining how you use the time machine ,,,grapher thanks thumbs up 👍

[@JustBlueFish]

Thanks

[@biscuitsalive]

My new 4r36 5sports Seiko is running + 7 seconds per day out of the box. I’m tempted to leave it as is. But maybe after a couple months il try to regulate.

[@shaneweightman]

Easy way to adjust the timing would be to leave the watch on the work bench to stop working before adjusting to save catching the balancing wheel ,,, cheers Shane uk 🇬🇧

[@JustBlueFish]

You’ll need to get it running after the first adjustment to test it, and it’s likely you’ll have to adjust it more.

[@neilpiper9889]

Vostok Amphibia are easy watches to regulate and the gasket doesn't need replacing due to its special caseback design.

[@JustBlueFish]

I have ordered an Amphibia, just waiting for it to get here.

[@whizwheel9436]

Nice discussion, camera angles, and clarity. Question about watch placement on the timegrapher. Do you loosely replace the case back when checking the error/rate in the face up position, or is there a way to place it on the holder so not to touch the movement with the case back removed? Looking to get a timegrapher in the near future after frustrating attempts using an earbud mic and phone app. Thanks for the clarification.

[@cobolsaurus]

Handsome watchmaker...

[@jbbrabant]

Thanks for the video, it was helpful. If, however, I were to have the watch pressure tested after regulating it I would rather the watchmaker do the regulating as well.

[@ForeverUnknowing]

Very informative. I have an SKX007 that I will probably try to regulate myself in the future. I'd need to obtain a timegrapher and tools first for doing so, but I'm also curious if the watch doesn't need more professional attention. Right now with consistent wear it loses 1 full minute a day, and it's a secondhand watch (serial places it between 2004 and 2014, though I'm inclined to believe it's a 2014 based on overall condition). Might be worth playing with to see if I can tighten up that timing and if it seems like there is an issue with the movement, maybe I'll just spring for an NH36.

[@SuperExadidas]

Nice tutorial. Among these 3, which do you think is best?

[@WinWithZach]

I’m left handed and wear my watch on my right wrist, so my watches rest in the crown up position often when my arms are down by my side.

[@JustBlueFish]

Yeah there are occasions such as for lefties where measuring the crown up position makes sense.

[@jeffreyalbarandorivera8595]

Sir I admire your works. It reminds me of my grandfather job..Sadly he's gone last year. Those knowledge not fully shared to me. Anyway thank you for sharing your idea. Keep on posting sir. So by the way what's the difference between 7s26A and 7s26c?.Will the main assembly match each other?

[@JustBlueFish]

Thanks for watching. The Seiko movements went through revisions from A to B and C over the years. I’m not 100% sure, but I think the primary changes had to do with the balance, spring, and regulator as well as standardizing components across the different line of movements.

[@joebloggs5454]

I purchased a Seiko 5 Sports Automatic SRPG29K with a 4r36 movement in Australia in February 2023 and the world should know that this watch lost seven minutes in the 24 days of the first month of ownership. I advised the Seiko Australian supplier Linda and Co that the watch was faulty. They replied that it met the specifications so no warranty. Think about that before investing in a Seiko watch.... Robin T 28-March-2023

[@lucderan]

I bought a vintage seiko 7s26A that uses to gain 1 hour in a night. So I tried to regulate it.... Now it gains about 4 hours and half per day!! 👍🏼 But I've found the solution: SPEND MONEY! I'm going to buy another movement hoping it will nail, at least, the day!!! ahahahaahah

[@JustBlueFish]

Good luck with the new Seiko.

[@jacc88888]

Haha!

[@--RSL--]

dielectric grease works on the gaskets... tiny bit on index and thumb, swirl your fingers together and then run the gasket through, it will apply a thin coat and should be good!

[@patras1514]

si,estoy de mi 7s26c hasta los cojinetes. martillazo y santo remedio.

[@KiwiPokerPlayer]

Precision vs accuracy... You were spot on. Do you have a physics/engineering background?

[@JustBlueFish]

No I don't have a background in those things. But I did stay at a Holiday Inn Express last night!

[@KiwiPokerPlayer]

Ah, that explains it. Love your videos dude. Keep it up.

[@timur7381]

just the video I needed :) I kind of want to regulate my Orient, but wasn't sure if it's worth it. Question - would opening the back seriously compromise the water resistance? I'm not a pro diver or anything, but I would like to be able to wear the watch without worrying of getting it wet.

[@JustBlueFish]

If the watch is relatively new no I wouldn’t think so. The problems could come up from an older watch with a worn or dried out rubber gasket that needs replacing. Also problems could arise if you kink the rubber gasket when screwing the back down.

[@tasteapiana]

I set a 7S26 to within -4 s/d without a time grapher, just by adjusting then checking it after 4 hours, and it took about 3 to 4 weeks to get it done. That watch gave me just about 10 years of solid performance so I just got another, once it started to slip again, and said to myself ''You know, $7/yr for fairly reliable accuracy is a good deal''. Out of the box, each was 4 to 6 s/d (fast, in my case), initially. Once I realized it was going to end up 1 minute behind every week, I did the math and found it's just best for me to replace them every 10 years because servicing (especially paying for it - cleaning, lubing, etc) just isn't worth it. I've made mistakes in life that cost me $70,000 because I couldn't, without a watch, tell the difference between 14 minutes and 15 minutes. Never again. I'm a Seiko fanboy for life at $7/yr, and everyone else should be as well, period.

[@twbrkfd1733]

What if you get a hair into the hairspring? Probably good to wear a hair net...in your case, a beard net. Excellent video quality. maybe use a telephoto lens on your camera and feed it to an HDMI display. The camera and lens can then be a foot or more from the watch and out of your way! Great video!

[@thisisbadstuff]

7 second difference in the vertical positions. That's pretty tight poising. The vertical positions do run a bit fast compared to the horizontal though. consider opening up the regulating index by turning it's etachron adjustment clockwise a bit. Also you want to wind the watch fully before you do any regulation. On this movement you can wind it up manually by turning the screw on the ratchet wheel(on top of barrel) a full 8 turns clockwise.

[@JustBlueFish]

Thanks for watching and for the insight.

[@ianbutler1983]

Normally the accuracy and precision of things is very important to me, but for some reason my automatic watch being off 10 or 5 seconds a day does not bother me at all. Thanks for the video, it was very interesting.

[@JustBlueFish]

5-10 seconds for a Seiko is ok. 5-10 seconds for a Rolex would bother me a lot.

[@sashachip]

People forget there are over 80,000 seconds per day. Even 10s deviation in 24hr is incredible engineering feat.

[@ju2705s]

Best tool to open a watch is a ~10cm rubber ball. I tested it and real works fine.

[@garyshepherd9226]

When you do an adjustment to the two levers, and you say you put it back on the timegrapher to check, do you put the watch caseback back on the watch each time?

[@garyshepherd9226]

Hi - I am a recent subscriber but really need your advice on the watch regulation as I need to do my King Turtle - you say that after making the adjustments to the beat error or time levers, you put the watch back on the timegrapher to check. Do you put the watch caseback on each time you check with the timegrapher? I assume you do but was not sure.

[@waktosha7378]

I use a timing app. I have to get a timegrapher for my beat error now. I have a few watches that keep changing on the accuracy, so I need to get that beat error right on them. I have been needing one, but have been putting off getting it.

[@JustBlueFish]

For the price of an inexpensive watch I think it's worth having the timegrapher if you're a collector. The Weishi that I linked in the video description is under $150 on Amazon. I feel like it's a no brainer.

[@waktosha7378]

JustBlueFish You're right. I just keep finding a watch I like and then goes the timegrapher again! I will get me one though. I'm super it will beat my timing apps, and being able to adjust the best error will be just awesome! I have over 30 watches to keep in proper regulation!

[@JustBlueFish]

30 watches!!! haha and I thought I was going overboard! Just kidding, enjoy the collection and thanks for watching.

[@waktosha7378]

JustBlueFish Yeah, it just kinda happened before I knew it. I should probably thin out the collection some, but I can only find 2 I would let go of. I love my watches, and they almost all get wrist time. I have slowed down though. There are a few more I will eventually get. Most of them are Seikos with a few Orients and a Hamilton 38 mm handwinding field watch. I do wish that more of my watches were straight manually wound, because it just gives you that extra connection to your watch. I do also have a Wancher 30 degree manually wound little 34 mm watch with a Sea Gull ST17 movement in it.

[@ItsNeverTooHot4Leather]

Good tutorial. Just thinking that if the watch is, for example, originally running -13 seconds on the wrist and -10 seconds in the dial up position, then wouldn't you want to regulate it to +3 seconds in dial up position? That would account for the slower running time while it is on the wrist versus the period when the watch is "resting" at night off the wrist (when it runs slightly faster). I guess an easy way to find out is to first regulate it as best as possible, then wear it and measure after a couple days, and then regulate again to be even more precise.

[@xxgg]

I would like to know.... At what level of power reserve should one be regulating the watch at? I have tested with my Seiko 5 at whatever power reserve it was at, same it to correct time and i manually shaken my watch which watching a movie... constantly on and off... (arm/wrist got bit tired). After that... watch was maximum of 3min30secs faster but couldn't get it go speed up anymore. At this stage, I have worn the watch everyday as normal and after 4 days... monitoring with a WatchCheck app, I started with deviation of +33, now +60s, Rate average of 13.9s/d (low of 10.5s/d to max of 18.9s/d during 4 day monitoring).

[@JustBlueFish]

My understanding is, when a watch is being regulated by a professional it's done after it's full wound up and has had around 30 minutes of running to let the movement settle. Once regulated it's tested at full power reserve and then again after having been running for 24 hours, and readjusted as necessary.

[@L1011MD11]

I was wondering, is it necessary for the movement main spring to be completely wound up when regulating it? Will the regulation of the movement be consistent regardless of the power status of the main spring?

[@JustBlueFish]

Yes the movement should be fully wound up. As the power reserve gets low a watch will generally not keep time as well as when it has full power.

[@piNNoyLA]

Would it be safer to adjust the levers with the movement hacked? (Or will that mess it up)

[@1bob590]

Hi, in skx when i close the cashback the waterproof it is like before?

[@AppleFanX2]

Great video! Did you put the case back on every time you rechecked it?

[@JustBlueFish]

Nah, just set it on the microphone stand without the case back on. Just make sure the stand is clean and there's not a bunch of dust around.

[@wongjeechoong]

I think it's hard for most watches to be 'precise'. How much it gains/losses time per day really depends on the various positions the watch is left at and for how long a period of time in those different positions. This is due to gravity, and I don't think Seiko movements can overcome that problem with its 2 levers. I know Rolex has tried to overcome this by adjusting its balance wheel by placing weights on the balance itself, the idea here is much like balancing the wheels on our cars. These weights on the balance wheel are essentially screws which, if say, loosened, will make the balance wheel heavier at the point of the screw; and vice versa. And Rolex regulates their watches at 8 different positions. Now, after I complained to them that my Rolex is not accurate, they kept it for a month to service & regulate it. Even after all that effort, it 'usually' gains 2 seconds a day. And after 30 days, I would hack it for a minute to sync with the correct time again. Strangely, after that, it starts to slow about 2 seconds per day. Leave it for a few days to wind down, then wind it up and wear it again, it returns to gaining 2 seconds a day. I wouldn't call this behavious 'precise'. So as far as Seiko movements go, how do we find the true 'average' beat error and rate differentials. Say we note that it runs 10 seconds fast per day, but then while on the timegrapher with the watch faced down, it says rate is -15 seconds. Assuming, for now, that beat error is 0, do we simply adjust rate to -5 seconds? And if beat error needs adjustment first, then I'm totally lost as to what I should do. Maybe we should simply stick to 1 position (usually face down), adjust it and live with it; and say, "Hey, at least my watch doesn't need a battery!" I mean, it's gravity we're trying to overcome.

[@davemackinder6518]

How long should the 7s26 hold power for. When I wear my skx007 it seems to hold time ok. But when I take it off at night its normally stopped by 6am. Is this normal???

[@whoknows8678]

I've regulated a few movements and my issue involves reinstalling the caseback. I can get things darned near perfect on the timegrapher, but that gets thrown out of whack when I tighten down the caseback. And, I'm not torquing it down with gorilla strength, either. So, that creates even more trial and error which is frustrating.

[@RobHalliganProjects]

I might add: If you don't have the movement fairly well wound up, the readings won't be good. I sometimes grab a watch which only has a little power in it and put it on a timegrapher. (When I realize why the readings are so bad, it's always a relief.)

[@orlandobrulli1832]

Ive just bought a seiko 5sports with 7s36..and after one day of running is gaining 2.30minutes day.. Do yoi think can be adjusted with this metod?

[@milo5524]

Anche a me "corre" di 1 min e mezzo in avanti. Però mi sembra di aver risolto mettendolo di un minuto e mezzo indietro...😁

[@SilverBackELTorro]

IMO the 4R movements runs a little better and is more robust that the 7s movements. I am new to the watch world but from what I can gather the 4R is a slightly better movement. Change my mind. 😆

[@dogfood2525]

How did the watch adjustments work out over the long term? Did it coincide with with you readings?

[@JustBlueFish]

Last time I checked the watch was running around +8 seconds on the wrist.

[@hungwensun]

Thank you for the video. One question at the 30min mark when you placed your watch on the timegrapher did you place it on dial up or dial down? You explained you wanted to regulate your watch in the dial up position, is it a big deal to put your watch with the case back off dial up on the timegrapher? I didn't want to assume anything so I thought I would ask. Thank you for your time!

[@JustBlueFish]

It was dial up, I put the watch on the timegrapher with th back off and have had no issue. The movement won’t fall out or anything if the crown is in, just make sure the microphone stand isn’t full of dust or anything.

[@hungwensun]

Thank you for replying!

[@JustBlueFish]

Any time, thanks for watching.

[@hungwensun]

I do have another question, if you don't mind. The question is, why is it a bad idea to adjust the lever that controls the beat error. It seems straightforward but there are some people who advise against it, why is that?

[@JustBlueFish]

I don’t know why people advise against it. I’ve seen that as well. I always adjust it when I do my watches. Maybe the people advising to not adjust that lever don’t have a timegrapher, in which case it would make it impossible to set correctly?

[@shaneweightman]

It makes me wonder , if wearing the watch and doing very physical activity wouldn’t alter the timing adjustment? Cheers Shane uk 🇬🇧

[@JustBlueFish]

Maybe, I see these watches go out of adjustment all the time.

[@sashachip]

Exactly why solid state such as quartz movements are recommended for any physical activity.

[@user-sp5bn6ye8y]

@JustBlueFish - I bought a 7S26 which has been fine for a couple of years since I bought it. It was a fresh-modded version. The movement is from 1996. It just recently started gaining 15mins per day. Its increasing now to 20mins a day! I don't understand why this is when it was working fine. Any help is appreciated

[@JustBlueFish]

I’ve never dealt with one running that fast. It could be magnetism of course, but there’s so many other things it could be and a simple adjustment like I did in the video isn’t appropriate to fix a watch going that fast. The reason a watch runs fast is ultimately the balance is spinning faster than it should. You’d need a watch maker to diagnose the problem and if it’s not magnetism a replacement movement is probably the simplest solution.

[@meenboli]

I thought one lever was for minor adjustments and the other was for 'bigger' adjustments? Is that not the case? (I don't know the answer - that's why I'm asking) If you adjust the beat error, does that not effectively correct the timing by default?

[@furzkram]

Most watch movements are slowed down when worn and in any angled position (other than dial up) because of the higher friction in the gears and bearings. Thus I rather adjust them to be at about +10 s/d in dial up position, so the watch doesn't start to lose time when I wear it longer. Usually I wear a watch (sometimes two at a time) for only about 4 to 6 hours a day.

[@suennio]

I set the lever to minimum, but the clock still gains considerably ... one minute per hour. the movement is a Seiko nh35. any advice? thank you very much

[@lowersaxon]

Its magnetized. I Recommend a watch dealer.

[@bernardocourrege6283]

Is there any harm done if an automatic stops (power runs down) during a day/date change? For example, a Seiko skx, which takes 5 hours to complete the whole day/date change.

[@WHITE-FLIGHT.]

Good video. Cant I just pay you to adjust my seiko 6r15? 😎💲