The ONLY Seiko Movements You NEED To Know - Differences & Similarities

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[@manoflego123]

A fun fact you may have noticed about the movement identifiers: any modern movement that ends in "5" is date-only, but one that ends in "6" is day-date.

[@MohitKumar-pl1hp]

At the one which ends with 4 is GMT

[@---td4ff]

​@@MohitKumar-pl1hpmiyota 8N24 is not a gmt lol

[@MohitKumar-pl1hp]

@@---td4ff I was talking about seiko NH movement about which video was about 🙄

[@theinceptor3672]

​@@---td4ff my guy, this ain't a miyota video

[@---td4ff]

@@theinceptor3672 I think I was trying to reply to someone else lol my bad

[@joeskeptical4762]

*_....plus, they are all reliable, durable and long lasting. They can go as long OR OFTEN LONGER than most mechanical movements of any price, between overhauls. Cleaned & oiled regularly, they can last a lifetime if not damaged by impact or corrosion._*

[@GVSolo]

This is the best movement breakdown description and explanation video I've seen. Talking about "dumbing it down". Thank you.

[@tarasmathers7423]

There are actually a portion of "6R/NE" caliber movements that are 4hz, 28,800vph. The 6R20, 6R21, 6R24, and the 6R27. The 6R21 is the branded version of the NE20. These are the power reserve models with varying jewel counts, as well as power reserve capacity. Some 6R's have 45 hours, some 50, and the 6R35 even has 70. I know that this was just meant to be an overview. Just sharing info. Great job

[@michaelparreno5391]

All reserved main spring is the same length but the fullever (automatic)now a days is commercial,there no bushing anymore, in the center of fullever,the it fast in wear and tear,thats the evereaday that I repair here in the Phillipines,I love 7009 or 7002 or 7019,it's durable since 1980's90's,thats the deferent of 7009 and 7s26

[@qwasd0r]

Handwinding really isn't that great of a seller for replacing a 7s26. You shake it for a few seconds, put it on your wrist and it'll run fine.

[@chrishartwells6029]

I just got into watch modding and this is by far the best content u have put out(only slightly edging the beginners tools, tutorials and advices). U have no idea how helpful this is it, oraybe u actually do caus u were once in our position. I hope u become as big as TGV one day. Cheers!

[@canadianwatchmonkey3992]

Great video that clearly explains the differences between 7S, 4R and 6R and that the NH and NE line used in micro brands

[@markanthonyking]

I’m a simple man, I like and enjoy the 7S movement,

[@AbdElHmyd]

After 3-year full service at authorise Seiko SC, my 6R15 running at +2/-1 spd. Extremely grateful.

[@OutsideLands77]

This is helpful; thorough without being overwhelming.

[@JayzBeerz]

Great video. I wish you went through all the Seiko movements.

[@soycolombianisimo]

Great Job man! I love seiko. I have 1 SKX that I love with 7s movement. I also have two more divers with 4R36, also a Solar one and a a Quartz one. All of them reliable, beatufifull. Seiko is the best brand in the world for the money.

[@edhall5772]

Not boring at all, very helpful and educational. Thank you

[@jswilliamz89]

well said, thank you man, seriously your killing it and I love your videos.

[@LumeShot]

cheers dude

[@stickiestfingers2155]

Thanks for info. I got my first Seiko because of you!

[@paul8821]

The memory man on watches good vid i now no all about my seiko many thanks

[@darkovilos]

This is the most complicated video that I ever watched but I totally understand everything he said considering this is the first video I watched about watch movement.

[@LumeShot]

haha

[@danielholman3436]

Excellent video! Thank you. I wish I had seen something like this a few years ago.

[@MrMadvillan]

I believe the common assumption that the 4R/NH movements are always an _upgrade_ to the 7S is not entirely correct and is largely perpetuated for the sake of the mod. On paper, if the biggest difference is the lack of _hacking_ or _hand-winding_ and not frequency, power reserve or accuracy, the assumption is that hacking and hand-winding is _always_ better. The reality is that hacking and hand winding features(but also calendars and high beat) add complication to a movement which combined with human error or misuse can result in shorter service intervals, malfunction or failure of parts. Hacking typically means a setting lever physically stops the balance wheel which could in time effect beat error and amplitude. In any case the setting lever typically has to reach across the entire movement as the balance tends to be mounted opposite the winding stem plus a spring to hold it in place. These are points of failure. Additionally hand winding an auto, epically topping off power, isn't best practice as the rotor will keep winding past full. Hand winding an auto is only meant to be turned once or twice to get the watch going. In practice, the winding pinion has to engage, bypass or work alongside the automatic works which means much smaller, more delicate gearing in an auto as opposed to a true hand winder which is purpose built. Further, the mainspring of an auto is meant to slide along the barrel wall as a safely measure in the event of its being overwound - you cant stop a rotor from spinning. That being, hand-wining an auto more than a turn or two will increase the frequency a mainspring slipping, eventually waring away the inner barrel walls which can lead to inconsistent power transfer and reduced performance. Personally once you've experience a simple hand winder, there is nothing more unsatisfying or seemingly pointless then winding an auto. My ultimate point being, I believe Seiko intentionally designed the 7S to be a movement with as little human intervention as possible as to last as long as possible without service. I believe with the nh35, the idea is that with total ubiquity and low cost you can simply toss it once you break something.

[@rabitoblanco]

Such a great breakdown, thank you so much!

[@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

[@X85283]

That's 15 seconds per day and within spec? You can have someone regulate it better, probably, but you're not going to find a company that will replace a $200 watch because of 15sec/day. If you want something certified to be at +/- 2sec, go buy a Rolex for 5-10x as much. Just be aware you'll need to have it serviced every year if you actually wear it or it will start to slip towards +/- 15. My 4R36 runs at -2/day, and my 4R34 was +3/day for what its worth, both are factory regulated.

[@TheOutdoorMonkey]

Thank you for sharing your knowledge. Your videos are my great source of reference in Moding my Seikos

[@chrisb5917]

When mentioning the SKX line of models... no one ever mentions the 011.... Orange ya glad I I didn’t say175.... 😆🤣😂🤣😆

[@mikeingeorgia1]

To me, who is quite new to this, this information was very valuable! Thank you so much!

[@randynovick7972]

This is a really good way of explaining them. Thank you. Have you ever taken on a commission for something with an ETA or Sellita movement?

[@shaneintegra]

The only watch I've owned in my life is a Gshock and I got that about a year ago... But I absolutely love watching your videos! I'm saving up to have my first automatic be one of the watches you've worked on :D

[@arlindjax]

Do it my friend you won't regret it. I'd recommend starting with a SKX007

[@MountainSalsa]

Very helpful thank you. I've had my SRP777 since 2019 and just recently considering modding. Coin edge bezel and maybe different hands.

[@alainmongenot152]

Not boring at all, you are awesome and explain really well

[@ronwalsh]

Great video. I have an older 6509 that I may need to upgrade the movement in. Your info is just what I needed.

[@jimf.625]

OUTSTANDING! Very well explained and informative. Thank you!

[@schoolofmediocrity2801]

Soooooo... I know that NH35 and NH36 are the same size and use the same handsets, but how about the 7S? I would love to add hacking and hand winding to my Seiko 5, so could I slap an NH36 in it and reuse the same hands? I suppose I could break out the calipers and measure the pinion et al, but I'm hoping you already have that info.

[@Keeperofthekey13]

G'day, I enjoyed the info but I need a little more please. I upgraded from NH35b to NE15c. It cost me 4 times as much ($220) so, besides the 50 hour reserve, what other components make it higher horology? It's certainly still got the four nylon components on the dial side ! I imagine the spring is stronger but that's all. What info do you have please?

[@muhammadzayed8786]

Which ones more reliable or long lasting. The 7s vs 4r?

[@aidelibrahim6379]

Me own skx011, love the color, but bit hard to read the time on sunny day compare to skx007

[@salembeeman370]

Boring to some to others a great wealth of information. You are awesome.

[@irumwhite4459]

Can you please check how similar the new 6r35 is to the 6r15?

[@dgdave2673]

You didn’t cover the 6R35 and 6R54?

[@BobMarley-pm1xb]

Superbly informative vid! Thanks

[@kikomachine8276]

Thanks for the free lesson. 👍

[@reggievanness]

Very informative and helpful not boring 4r35 movement in two of my seiko Samurais and my SKX 7S movements all keep good enough Acuracy for my needs !

[@drwindsurf]

Thank you for an excellent summary of Seiko movements 😊👍

[@grapevinelover1]

Though I don’t prefer a day/date, perhaps I’ll just stick with purchasing a Seiko 5 and have the movement regulated.

[@JDRichard]

You are a smart dude. Good video. I am a watchmaker who focuses on restoring pocketwatches but do repai the occasional watch and I did not know the relationship between 4R and NH.....thanks

[@HauntingTheHoly]

Why did I have to spend SO LONG to find a simple and rational explanation of these movements for which you'd think everyone would be looking? Thank Bokonon for you!

[@metaldog7128]

100% not boring.....and very interesting and informative 👍

[@sergiomalespin3326]

Very well put together video and very clear spoken information! Thank you for teaching me this!

[@SilverBackELTorro]

Dude. Your explanation of the movements is the best. New subscriber here. ❤. Picking up the SRPE74 WTH the 4R36.

[@Tatsenaiga]

How about the Solar movements like the V176?

[@Don-Anvar]

Great video. Thank you. Im trying to better understand this hobby and you clarified a few things for me.

[@rafayz9033]

Talking about accessibility, what are your thoughts of the pricing of the new Willard re-issue?

[@dominictran8495]

Thanks, this was good information.

[@hennychestnut5479]

You break it down so we’ll. Good job man

[@DoktorDetroit]

Entertaining? dood....very informative for someone just getting into this money pit of a hobby. Greatly appreciated.

[@Sr.D]

It's just me or equivalent miyota movements just look more polish and better finish?

[@zaidhakki4054]

That was awesome mate!! I was in 2minds about a purchase, but your info cleared it up. Cheers

[@watchreviews4k]

Interesting review. Regards.

[@kcbuys]

u got it so simple man. thank u so much for this

[@thezionsoho]

Would you mind doing and update video on this subject

[@purrungas2012]

Top of the line info bud,thanks for your video...right to the point

[@Onward1969]

Nerd level 100! Keep this info coming.

[@Bob.martens]

MM-style hands are the best mod for any divewatch.

[@vegetabrah1889]

The caliber 6R35 holds a power reserve of at least 70 hours, not 50 - small correction :)

[@antidot556]

I love 6rxx series, no offense. But sometimes SW or ETA offers better quality and timekeeping experience w/ better price point than those 6r. You can even find some eta 2892 in some microbrands which offers watches just under 700 usd.

[@techguy9023]

So what movement not listed here is the most accurate Seiko automatic? Is there something better?

[@helipadny1]

Crushed it ,, Thanks !! Simple and to the point !! 🤛🏼

[@RyanWestphal997c4]

Great video. Newbie to Seiko so really helpful.

[@firdausfidos]

There is new upgrade on 6R series for 6R35 movement get more power reserve appximately 70hr compare to 6R15...

[@Biking360]

Well done lad. You make excellent videos that are always fun and interesting to watch. JP. The old guy.

[@LoadedGunsMusic]

This is great! I'm late to the party but I've been looking for this info everywhere. You have a new sub! Keep it up. Hoping to get you to make me a mod someday. Cheers!

[@TerenceHughes4501]

I got my 7s26 running to within 5 seconds a day.

[@stikmalegecko6635]

That black watch with the purple/reddish glass is beautiful. Any idea how much that was/can be sold for?

[@amenhotep7704]

I always wonder ? People complain about the 7S26 movement found in the SKX and it’s fine but if that watch movement is so crappy because you can’t manually wind it why are people loving it so damn much ? As for the price, it has gone up to 950$ and at the time i bought it i got it for 275$. Nowadays people are killing to obtain this specific piece because Seiko is no longer producing it and she is starting to disappear. I will never understand what is so wrong, this watch can survive up to 15 years without a damn service, I’m a bit confused.

[@razvanon]

Hi ! Is there any seiko sarb033 case like for custom build that will fit my snxs79 dial and hands ?

[@pskanp]

A good, very informative, watchable and better video than others. So I think getting a date only seiko means it's better to go for 6r than 4r right? How is 6r in terms of reliability weight and serviceability worldwide as compared to 4r.

[@daniel-vm3qn]

great job explaining and simplifying !!

[@johnmcdonagh1607]

Great info’, thank you 👍.

[@jimbobxcityguy5338]

My question is are any of those movements going to last longer or take hard use then the other or are they all the same level of durability.

[@markcoffman494]

Watchmaker here! All of these are very durable, however they do use plastic parts, so those would be prone to be damaged more easily than the brass, or still parts. All of these movements will last many years, and many years without service, however I do recommend them to be serviced ever 5-7 years. And if you dive with your watch, those gaskets should be check/replaced every 2 years.

[@melbguy1]

@@markcoffman494 Another thing to mention is, if you order a modded watch, modders generally don't 'proof' the watch. Hence, if you wanted to go diving, It is recommended to have the watch proofed. An authorized Seiko watch repairer should be able to do that, or refer you to a business who can. Though of course, stock Seiko divers watches like the ISO-certified SKX-007 are proofed by the factory before they go out

[@robertwilliams1286]

@@markcoffman494 I have a non screw down crown Seiko sarb033. How often should I check my watch gaskets if I occasionally wear my watch in the pool or when bathing my son and forget to take it off?

[@markcoffman494]

@@robertwilliams1286 if you are swimming with it regular for sport or pleasure, I would recommend every two years.

[@robertwilliams1286]

@@markcoffman494 thanks for the response mark. My style of water sports is making sure pool water doesn't find its way into my beer 😂 seems like I should be ok

[@giamgiamgg]

Simple & easy to understand, thanks!

[@SHEHANRUSH]

Very informative video keep up the good work & increase the background illumination next time

[@Andy_XT]

Thank you! Very well explained!

[@robertarthur3532]

Excellent video sir, this helped me very much.

[@philipdenner8504]

I'm doing a mod on my 7S26 SKX007, i am replacing the movement with a NH36 movement. now you say i need to change the day wheel to the 7S26 movement wheel, well i damaged it apon removal and went to buy a new one off Ebay but all the day wheels for sale say they fit 7S26 and NH36 movements. i confused, where can i purchase the right part.

[@vassy5447]

Thanks. Very informative and helpful

[@prashantnavghare8436]

Thank you for making this video.. very informative 👍

[@andrew811ful]

Dude this is so informative! Thanks

[@jetsonIFY]

Love your videos! Just started getting into watch building and have 3 old 7s26 movements I am learning on. What size winder would I use to do mainspring cleaning. I would to do them one caliber at a time because of price. Love your moding vids!!

[@H0kram]

6:56 so the 6R15 is so similar to the 7S26 that it even uses its big ass plastic piece for the date change mechanism.... It's on watches like the Sarb series, costing much more than the 7S26 watches. How disappointing.

[@MrMadvillan]

I'm now sure if the day and date jumper being plastic matters that much. Since they interact with the calendar wheels none of which should be lubricated, I suppose it cuts down on metal on metal interactions. But yeah plastic parts are especially disappointing when the movement gets up there in years, get brittle and break.

[@ahmedhisham1230]

You added alot of infos for me , thanks alot

[@faridjaygaza2112]

What about spring drive?

[@johnmoran959]

any idea what my seiko 5 7019-8180 movement has and what I could upgrade it with ?

[@saidomani5394]

Just asking what is the model no for the watch at 3:16 Sorry I am new in seiko watchs😁

[@galuhrichata6148]

Simple, straight, clear and informative video. You are a good teacher. Keep up the good work, Bro..

[@michaeldalumchristensen2670]

Thanx, for me it was very informative 🙂

[@migoy13]

Thank you for this. Very informative.

[@nelskyeskyenavales2298]

7002 also no hand winding?

[@violinmke]

4R a good starter watch for your first auto.

[@jaycrispaguio4315]

does all movements fits modularly if i want to change the case

[@jamesherrington5606]

Good job. Exactly what I wanted to know.

[@lebowskiunderachiever3591]

I am new to mechanical watches . I have two Seikos with a 7S movement . Both seem very accurate while in operation . However the one that I prefer to wear stops much sooner than the other . Any ideas or tips ?

[@jochen5653]

How big are the differences between 4r35 and 6r35 outside of the power reserve? Accuracy after regulating and robustness wise?