1978 Seiko Pan Am M158-5000 Vintage Digital Watch Restoration

[@paulabarnett2663]

My father was a flight engineer with Pan Am for 29 years and he wore a Seiko M158-5000. He loved the watch and I loved to see him wear it. Thank you for bringing this precious memory back to folks like me and hopefully many others.

[@MyRetroWatches]

What a great coincidence that he would wear this watch and it then being nicknamed the Pan Am! thanks for watching.

[@dkevvv]

I believe it was named Pan Am because Pan Am gave all of their pilots the watch.

[@MyRetroWatches]

@@dkevvv I didn’t know that I read it was because it was favoured by pilots but your info sounds more plausible. Thanks

[@MrHYDRO84]

Fabulous

[@DannyOhana]

Don't often see digital watch restoration, this is more (micro) electronics repair than watch making, hats off to the stacked skill set.

[@MyRetroWatches]

Thank you. I will try to repair any watch that takes my interest.

[@bindhudasari2702]

Goog GB ok tyqqqA aa á🎉😂À😂ààaq😂 mgmm😮😅😅t Jeth hg 😊Hiub😅​ Hii 😢 mumm mmk dry

[@jonabitstream]

I'm grateful to see someone seriously address digital watch repair. Thank you! And wow, what a cool old watch!

[@MyRetroWatches]

Thank you. I have a playlist of all my digital watch repair videos on the channel.

[@abnnuzzinicholasclay686]

​@MyRetroWatches do you sell ?

[@MyRetroWatches]

@@abnnuzzinicholasclay686 rarely. I pick up watches I want for my collection with the proviso that they need work.

[@Chunky246]

I remember my dad getting this watch when I was a kid. Blew my mind!

[@kostaskritsilas2681]

The Seiko machine that you are using to check the accuracy is, in its root form, a frequency counter. It is measuring the frequency of the quartz crystal oscillator inside the watch. It is then comparing it to the ideal frequency (usually around 32 KHz, but it does vary), and then takes the variation between the ideal frequency and what the watch frequency, and calculates the daily variation from the ideal. The heat you are feeling is probably from an ovenized crystal oven, which creates an extremely stable frequency that is the reference for comparison to the watch’s frequency. Crystals do change their frequency when exposed to temperature variations. Pitting the Seiko timing machine’s crystal reference in an oven reduces the variation significantly. Typically, a frequency counter with a regular crystal will have a variation of 1x10^-6 to 1X10^-7. An ovenized crystal will have a variation of 1 X10^-9 to 1x10^11.

[@zandrm]

How does it pick up the oscillator in the watch? Inductive?

[@Stampe-OZ0AS]

The frequency of the crystal is 32,768 KHz

[@DERKONIG12345]

Yes it is an integer power of two. Flip flops always divide the frequency by two, so with this frequency you can eventually get an exact 1 Hz... (s^-1)@@Stampe-OZ0AS

[@tylerufen]

i wouldn't know the actual means through which it picks up the crystal oscillations, but the crystal sends out pulses of electricity, this creates a small electric field that's picked-up by the processor to clock itself, a bit like a piston in an engine, it uses the crystal to know it's up, and down states, either way that pulse of electricity is going to be at, or near a specific frequency, and you can pick-up the electromagnetic field from it using the base he put the watch on, so there's a coil in there, i guess it would be inductive, and from the pulses received from the coil, it can count what's happening in the watch... i think, anyway... kinda like how you can charge your phone, or toothbrush without electrical contact, same thing, but really small currents...

[@bottomline99]

Took the words from my mouth. My grandfather founded a crystal oscillator factory. Today the supply OCXO to satellites. The temperature at which the oven heats to, brings the oscilator to a flat point on its cubic frequency response vs temperature graph, that itself is determined by the angle at which the grain is cut in the quartz.

[@vincenzo.caserta]

This vintage digital watch restoration video is amazing! Your skills are incredible. The way you take apart, clean, and put those watches back together shows a real talent. It's more than fixing a watch; it's like an art, and you've got it down. Great job on bringing those vintage watches back to life with so much care and dedication!

[@MyRetroWatches]

Thank you very much! I was not expecting such praise. A digital watch compared to a mechanical is a lot easier in construction so tearing it down is not scary . Glad you enjoyed this one.

[@jankaelin7241]

Oh yes! Very unusual these days to watch something like that - dedication ...

[@andyoverall1951]

I had to watch the video three times and I am pretty sure that you forgot to let down the main spring. 😂 All the pro's do that. I love these 70's digital watches that were new when I got my first watch. Thanks for sharing.

[@MyRetroWatches]

hahaha !

[@ericb8888]

Great motor skills and knowledge. The pauses where we can hear you addressing the problem are flawless;) My grail watch at 12 yrs old .

[@octaviussludberry9016]

Yes, we would like to see more digital.

[@scofab]

Well done and thanks for sharing. I'm old enough to remember the introduction of first LED, then LCD digitals and the fascination they brought. Regards,

[@hullinstruments]

My gosh. As an American who discovered British panel shows several years ago when I was struggling with taking care of my parents with cancer..... They have been such a lifesaver for me to unwind and always get a good laugh. Everything here is always so serious and life or death..... We just don't have television like you all do over there! I was literally just watching wilty and hignfy earlier this evening. And specifically remember perking up when I first heard the bit about Lee Mack being an apprentice watchmaker! I was an apprentice watchmaker for a few years right after high school, until I realized im not cut out for it. So my ears really perked up at that wilty bit..... And that's so cool to know that he was your apprentice!

[@hullinstruments]

Now I specialize in metrology equipment and test gear evaluation, calibration, and repair. And not too dissimilar from the circuitry found in digital watches. So I find that bit fascinating..... And would love the chance to characterize some of those components, and even decapsulate, x-ray, and reverse engineer some of the ic's and components.

[@MyRetroWatches]

Yes we have many great TV comedy shows. Not all Americans get our humour but some do. Actually plenty of Americans doing reactions to UK TV shows on here like King Boomer or After work reactions channels. Might give you inspiration to see more things you may have not known about.

[@furq8417]

Thanks for trying to save this watch. Anyone else would have chucked this classic

[@MyRetroWatches]

good ones are $300 upwards so throwing one would be insane. I was nervous buying it with no idea if it worked or not.

[@duanek9892]

Loved the combination of mechanical and electrical work performed on this watch....at times it was like watching an episode of the old 'Mission Impossible' series. Yes to more digital watches, yes to more on the Seiko quartz tester.

[@MyRetroWatches]

Thank you !

[@CrazyOregonBeaver]

Your Seiko tester is basically a frequency counter with a high precision crystal oven for temperature stability. Crystals do age over time , so it may not be as accurate as it was once was. The ovens usually have an adjustment port on them for the crystal adjustment if you have something to calibrate it against. It usually will tell you the frequency on the top of the oven. A nice piece of old equipment. Thank you for sharing it.

[@MyRetroWatches]

Thanks for your insight. I know a man who can calibrate this actually , not sure how it’s done but it can be apparently. This is the first time I’ve used it properly as I’ve only had it a month. I’m now electronically minded though but know it’s a good asset to have on the bench. Thanks for watching this episode.

[@wirdy1]

I have a witschi version and calibrated it using a cheap GPS receiver that outputs the 1 PPS signal derived from the atomic clock on board the satellites. Wiring the pps signal to a piezo sounder (optional - just to hear it) & wired in parallel to a rotor coil from a cheap quartz alarrm clock (for the tester to sense the drive pulses). Works a treat.

[@CrazyOregonBeaver]

@wirdy1 The GPS satellites have their clocks to less than three nano seconds, or 3 billionth of a second. You can 0 beat your receiver to WWV on one of the even frequencies, like on 20 Mhz, or 10 or 15. It should give you a very accurate calibration. I am a ham radio operator and we have been doing this for years. Just an FYI, but I would like to know how to get the GPS. I just have not tried.

[@HorologyBiology]

I love these. The Lemon Face! I've had a couple of these over the years and they rock! Great vid Mike

[@MyRetroWatches]

Thanks pal! pleased you tuned in for this one.

[@eagol]

1978 was the year I started working as a bank teller. And now I just retired and get my senior citizen card. By that time it was all manual operation. I was trained to add all the collected cheques with a big calculator with printouts and I think those calculators were the only electronic machines in the branch. It is quite amazing Seiko made such a small electronic watch by that time. Cheers!

[@WristwatchMedic1953]

You did an amazing job Mike. Thanks for the video

[@MyRetroWatches]

Thanks mate

[@traviswalker8933]

Love the digital watch content. Keep that coming.

[@MyRetroWatches]

As I find them I will bring them to the channel.

[@octaviussludberry9016]

That has given me the confidence to tackle the 2 or 3 70s digital watches I've got. What a lovely watch. I got the jitters watching you put those e-clips back though. I restored a Casio W-726 (buttons;gasket etc) and removing/replacing those clips, I was shaking.

[@MrSloika]

'World Time' watches were in vogue in the 70's The Concorde started service in the 70s and it was the 'Jet Age'. I have a Caravelle (Bulova) world time watch with an AS movement. This is the first digit world time watch I've seen. Learned something today.

[@MyRetroWatches]

Thats a good point.

[@dapsapsrp]

Very interesting topic here. I've never watched a digital time piece restoration and found this to be very interesting. I enjoy watching tools and equipment of all shapes, sizes and purposes being used to diagnose and repair things.

[@KrisKendall-io4hm]

Another great Video thanks again I have had a few seiko digital watches they were well made as all seiko were in that time I would love more on the QT99 because I would love to own one myself please keep them coming 👍

[@deancase8951]

Wow! Awesome restoration. So cool to see such an early electronic GMT. Seiko never fails to impress with innovation.

[@MyRetroWatches]

Couldn't agree more!

[@endy_fx]

Bit of a rollercoaster, so glad it worked out in the end. Great work on what was some cutting edge tech at the time. Massive fan of Lee Mack. Him and Tim Vine on Not Going Out was like my comedy dream team.

[@MyRetroWatches]

Next time I see you mate I will tell you all about it!

[@DavidSmith-1951]

Excellent video. I'm in Idaho so Denver time for me!! I say this with great respect---you are a complete watch Nerd!!! The highest of praise! Enjoy your channel!

[@MyRetroWatches]

Haha I will take that as a compliment 😂

[@dinkeenahines885]

I have this amazing piece.but the gold. Works very well and is in GREAT condition . Thanks to your video I know I have a gem on my hands!

[@Andrew-J316]

I enjoyed the digital repair of this watch! I have a Bulova Quartz from ( I think 1980) that needs repairing and looking at what needs to be done. I think my issue is a capacitor problem but not sure. Appreciated the troubleshooting you went through and was happy to see it work for you!

[@andyfletcher1214]

Fantastic stuff, Mike 👍 it was a joy to see the restoration of such an iconic Seiko digital 💛

[@jamessmith6402]

Thanks Mike super interesting video I love a quartz watch 😊

[@watchliker]

Amazing watch,rarities... Good work,thank you. Seiko the best watch and super technological.

[@dkevvv]

Thank you for the video. This has given me more ideas when I start assembling my M158.

[@AladinoDebert]

As a kid growing up in the late 70’s, this was my absolute grail watch (before I knew the term). Of course also as a kid I could never afford it… so thank you very much for taking the time to show us its innards! I love your videos man… 🙏

[@MyRetroWatches]

Thank you !

[@Drew-Dastardly]

Astonishing how much mechanical gubbins was in this digital watch. I do love the Panaplex display in the Seiko Quartz tester it has to be said.

[@adk7962]

I saw the thumbnail and literally let out a holy sh-! Because it looked so cool. Thanks for showing us the watch and the restoration.

[@MyRetroWatches]

For once my thumbnail worked! thanks for watching.

[@clive.r1414]

I like that watch Michael and of course you have set me on the path looking for one. It really is a cracking piece of watch history. You certainly improved the screen with the work carried out. Another good video and I would like to see some more digital watch watches. Well done!

[@dkevvv]

I have one I am restoring. It has been around the world many times. It should be together in about a week.

[@MyRetroWatches]

Thanks Clive

[@RealLatinGeek]

Very fun to see some digital watch repair and especially showing off a watch that came far before modern "one size fits all" movements.

[@luppino1965]

Fantastic work on the restoration, Micheal.. What a great save..👌🥳 you must be thrilled to bits! What fantastic watches these Seiko's are! Would love to see your digital collection! 👍

[@MyRetroWatches]

I will produce the collection video soon. I have to buy a load of batteries first 😂😂😂

[@luppino1965]

@@MyRetroWatches 😁😂

[@dbzamora]

Congratulations on this watch! Really a win. The display has come out very well! Great video as usual Mike. Cheers!

[@MyRetroWatches]

Thanks for watching

[@Frank-bb1yg]

Had a lovely spot of tea while watching, here in the colonies. 🤗 Seriously, thank you for an awesome look back at some of that classic vintage technology. On a personal note... Hopefully whatever issue you're dealing with, will be resolved quickly.

[@MyRetroWatches]

Thank you.

[@shimronnetia]

you are doing vintage stuff very nice things..

[@carlosoruna7174]

Brings back memories of buying a 1000 pc lot of discontinued NOS Seikos at 80% off list great watches from the mid 70s

[@MyRetroWatches]

what!?!?!?! 1000!

[@benhursitges59]

Fantastic... I was amazed to see how you repaired it. I congratulate you and I will not miss other repairs. Greetings...

[@BryanO92]

Haha, I can't believe you were on WILTY, I love that show! I must find that episode now. I hope all is well over there, Mike. Another great restoration, keep them coming.

[@MyRetroWatches]

Thanks

[@oz4acl]

@@MyRetroWatchesMust have been quite a challenge, listening to all that BS, while keepin the mask! Very well done!!! And as to the Watch. It's so much more of a stunner, than i would ever believe...

[@docbenway9407]

Thank you for this video .. I got a M158-5009. You have three time zones GMT (fixed as far as I now), hometown time and destination time. Works perfect for a 45 year old LCD watch and the Japanese were at this time outstanding in such technology. Years are ending with 2009 but I put year 1996 as it matches the year 2024.

[@gregkrueger331]

As an electrical engineer this particular watch repair resonates with me. Really enjoyed this one.

[@Bristol1]

That was quite the job. Well done, Mike. And thanks for the demo on the quartz tester, that's a really neat machine. Cheers!

[@MyRetroWatches]

Thank you.

[@matthewwarnes1992]

Let’s see more on the tester brilliant and yes I’d love to see your digital watch collection really interesting watching you rebuild it

[@MyRetroWatches]

Coming soon!

[@borassictime918]

Never seen that quartz tester, would be very interested to learn more about it. Those old quartz watches from 70s were really stylish and I admire your bravery in tackling such old electronics! I had a Casiotron on a mesh bracelet from 1978, from new, that I literally wore out after 15 years!

[@babelman1]

Great video, LCD display looked very good in final shots of video, would love to see more of your digital collection. I really enjoyed this.,

[@garyjung5407]

Great video Michael! I’ve repaired and restored several of the Seiko Pan Am’s (M158-5009) and they are a very intricate and interesting timepiece. I wish I had this video as a reference, it would’ve saved me a lot of trial and error. It’s always nice to see another piece of history brought back to life. Well done!

[@MyRetroWatches]

Have you ever made the screen brighter ? Still not happy with the faded numbering

[@neilpatrickhairless]

No idea why KZbin suggested this video to me, but I like that they did

[@novocanal7153]

I too kkkkkk

[@MarcKloos]

Same

[@80srenaissance67]

So you won't watch channels informing you of how corrupt so-called Western democracy is

[@davidmoore5925]

That's a very nice watch, reminds me that I've got to fix my Silver Wave Solar that I got new in 1983.

[@rustywrench2119]

Loved the watch restoration. And would love to see more on the test machine

[@MyRetroWatches]

More to come!

[@garyroberts4257]

Awesome video! Thanks!

[@MyRetroWatches]

Glad you liked it!

[@LandyVlad_Rides]

I've watched heap of mechanical watch repair videos - love them - and I assumed a digital watch fix would be super boring. Your video has proven me wrong! Cheers. Oh and yes that is a very cool watch. But it's a Seiko so of course it is!

[@MyRetroWatches]

Glad you enjoyed this one.

[@chrischarlton422]

Brilliant. You're very brave to dismantle that to that degree. I received a new Sekonda LCD that has a bezel thats sort of a panam homage without the functionality, but the Seiko has a much better case. Say Hi to Lee Mack by the way 😁👍

[@MyRetroWatches]

haha I will! The digital watches are much easier to take apart than mechanical!

[@anthonycaryl1079]

very cool, i'd enjoy tester and /or quartz watch content too

[@d.nguyen2900]

Thank you for showing, give me some insights to tackle mine PanAm 🙏

[@sageslightbulbs7508]

This is fascinating! So glad I found your channel. It is excellent work you are doing!

[@legacywatchguy8333]

Amazing job!! Well done!

[@MyRetroWatches]

Thank you! Cheers!

[@davidstokes5444]

Thoroughly enjoyed this video, a yes to everything and I looked up the WILtY as soon as you posted on IG, brilliant 👍👍

[@Ectica]

Brilliant 👌 would like to see some more digital vintage. Keep up the great work

[@SkyrayModels]

Amazing to see this watch be taken apart and rebuilt with such care and detail. I would love to see more of your collection, I still have a early Seiko Kinetic watch that stopped working and probably needs a capacitor replacement.

[@philmcconnell5830]

I bought this watch when they first came out and I still have it today. Rather funny that when my rather expensive Breitling watch has to go in for service, I wear my Seiko,and still love it like the day I bought it. Thanks for a great video.

[@radams009]

Wow a Pan Am Watch. That's awesome Watch.

[@MyRetroWatches]

Thanks for watching!

[@MrWansty]

well done mike, a great job

[@MrHYDRO84]

As an commercial aviation enthusiast this item is very exciting for me.

[@ForestWoodworks]

Brilliant, absolutely brilliant. I think you've spawned some digital and electric interest with this one and your older Timex Electric/Dynabeat video. I bought a watch lot that arrived Saturday and in it I found almost a cosmetic pristine 79 Timex Electric (not running) and a Timex Quartz Lithium Digital Chronograph, so I'm going to rehab them. Actually, the chronograph runs flawless, but it's got some black dots on the clear top layer. I'm not sure if that is the LCD, maybe so.

[@messageobliquespe100]

Enjoyed the vid, never thought digital watches get restored! I always liked the Red LED/LCD? Ones from late 70’s when I was a youngster. I kinda kept an eye out for one for nostalgia & chanced upon one at a car boot - but was more upmarket than the plastic jobbies/straps ones I remembered. Very stylish / thick heavy steel strap, very nice imho. I bought without testing just for the look. My surprise when I pushed the buttons a few hours later - it worked! I discovered it again only last week - & it still works!!!! Not changed the battery in all that time - no idea when the battery installed. It’s not massively bright - the segments look underpowered - but thought I’d leave it until it doesn’t work. Tempted now to replace battery…. Maybe I’ll find out what make it is as there’s no writing on it. Thanks again for your channel.

[@Mikelp73]

For me, in life, not much is better than a vintage digital watch. Or an 80’s clock radio. Can’t explain how important the 2 are to me.

[@KenDavisUK]

I was watching (no pun) WILTY when you came on as the mystery guest. I thought "I know that face" As soon as Lee Mack mentioned a SEIKO watch I said out loud "its Mike from U TUBE". I've been watching you for some time, as well as Joe, The Nekkid Watchmaker. Thanks for the vids, your doing great job.

[@MyRetroWatches]

Haha it’s the biggest secret I’ve carried since May last year! Lee was stuck on a Seiko 5 6119 movement. He found my channel and was watching the Seiko that survived a tank video. It’s an old one with dodgy camera work too but hey who would have thought he would be watching.

[@garybrown4671]

Nice watches! Nice work! Thank you!

[@MyRetroWatches]

Thanks for watching!

[@davidmulligan42]

I'd love to see the digital watch collection!

[@octaviussludberry9016]

There is a video that shows all of the watches I think.

[@MyRetroWatches]

I have just posted my digital watch video today. take a look

[@davidmulligan42]

@@MyRetroWatchesYes, I got through half of it yesterday. I left a comment about the first Seiko you posted, which I also owned for a while.

[@martinda7446]

I've been an electronic engineer for over 45 years.. I have had a collection of LED watches, and bought my first in 1976! A cheap Texas Instruments watch. I love watches, cameras, HiFi and ..and... My fave watch is my Speedmaster Albino. I mainly wanted to say I was blown away when the circuit board was revealed. A thing of beauty. What a surprise that was. (I thought I had seen everything..)

[@MyRetroWatches]

Thank you for watching. I would think for anyone who knows electronics would be cringing at my efforts! This circuit surprised me too. I have some Casiotron (first ever Casio watches) from 1974/5 and they were on ceramic boards with the traces within the board. They look like drawn on from a pencil if that makes sense. Amazing for such early beginnings.

[@adiazcroce]

Thank you, greetings from Mexico 🇲🇽!

[@MyRetroWatches]

Hola, thank you.

[@Merinov]

That's awesome to be on TV. Especially with Lee Mack and David Mitchell!

[@MyRetroWatches]

Yes was an amazing day. I had a zoom call with Lee for a few hours genuinely helping him with his Seiko 5.

[@wirdy1]

Lee seems like a decent guy.

[@saldogdave]

Typical quartz watches do not compensate for temperature, so it is important to take note of the temperature at the moment that you are regulating it. Worn on the wrist, the watch will get warm from contact with your skin so it will be warmer than the ambient temperature of the room. That temperature is roughly 30ºC, while the temperature the watch will be stored at may be considerably less. If you like to have your watch be accurate when you need to grab it and go, you will consider its storage temperature and regulate it around that temperature. Even if you wore it every day, it still will be off overnight most likely, so somewhere between storage temperature and wearing temperature would be a good spot to shoot for. The Seiko Superior and others that had twin quartz oscillators did do some temperature compensation. Those watches can only be regulated with the QT-99 (good choice of machine Michael!) or QT-2100 or later quartz testers or by using an adapter, called QT-Adapter, which was made to use with the QT-77, QT-100, and QT-200 testers. Lots of modern quartz watches are not even adjustable so this whole subject of regulating is moot and a quartz tester just tells you the rate it is running at. You will find most of those movements run fast a few seconds per day. High end quartz movements are thermally compensating and accurate to within seconds per year or month. Most (all?) vintage Seiko quartz movements had trimmer capacitors for regulating them, but the run of the mill ones today do not.

[@MyRetroWatches]

Thank you for your comprehensive reply. Yes I am aware temperature is a big factor and testing this watch at 10c was not a good working temperature but its where the machine is housed for now. Its only been used in anger once so far. I bought it from Japan and had it just over a month. Plan to do a video on it but as I am no expert on the machine or electronics I can only show how I use it really and I want to find out for myself how much adjustment a trimmer can give on a watch. Are you suggesting that even if I have the ideal temperatures that "regulating" the trimmer would not really improve anything? I have a Seiko 0634-5019 which runs at least 1 second a day fast on the machine and was going to adjust this one. Thanks again

[@saldogdave]

@@MyRetroWatches you can find articles on temperature compensation and estimate where the watch will run at the temperature you are aiming for, then regulate it at its actual current temperature to hit a specific target you estimated. Or, just shoot for perfect and then come back later after seeing the watch’s actual rate average over time and then speed it up or slow it down accordingly. But honestly, with a watch that doesn’t do temp compensation, there isn’t much point in being too exact, so I shoot for being on the plus side always because it’s easy to hack the watch when I go to use it and the rate difference over the course of a few days is negligible. I just had my 0439 on the tester the other day. I had it on my wrist for a long time. Put it on the mic and got a reading of +.015 (3 digits on a QT-2100). I left it there and watched it go all the way up to +.250 as it cooled down to room temperature, which I think was 23°, so about a 7° delta. But wearing the watch all day, it held within a second every time I checked.

[@christurner6430]

@@saldogdave With regard to Quartz watch timing trimmers, do you know if the good old Seiko Calculator Digital Watch C359 has one?

[@RobFranklinROX]

I had one of those watches, I absolutely loved it, I miss it terribly, and I've never wanted a watch, or a guitar or anything else, as much as much as I want that watch now I see it. Wear it with my infinite envy. Mine had "LAX" instead of "Los Angeles" on the face.

[@aricp9173]

I was just thinking about you yesterday. I was hoping you were doing okay. So it's good to see you working on an odd Seiko digital that got my interest.

[@MyRetroWatches]

Thanks . All good here although another blood test next week which is always a bit scary

[@aricp9173]

@@MyRetroWatchesThere's always those concerns, but keep thinking you'll be fine. 🙂

[@togobeyondnet]

Loved the vintage Seiko Lemon Face! great to see more digital watches restored. Keep Em coming i say!

[@Capt620]

Awesome video. Please do more digital watch videos.

[@MyRetroWatches]

Thanks! Will do!

[@Daud76]

This is the first vintage digital Seiko I have seen with the battery "screw out area" (whatever it is called) in quite good condition. As is the rest of this watch. 😊 Thank you for your restoration of this beauty.

[@NaNByZero]

Big effort for a digital watch. But congrats, you did it! Good result. Nice. 🕐⚙️🍸

[@Whuntmore]

Great Job! I was sooo hoping you'd try the other screen to see if it would be better. Keep up the great work!

[@foivosapostolos1211]

A very beautiful watch I knew nothing about. Thank you.

[@MyRetroWatches]

My pleasure!

[@ckbd19]

Oh wow! I recently saw that episode of WILTY and thought it was so cool that Lee is learning watchmaking, never put two and two together that his teacher is you! Very cool!

[@MyRetroWatches]

Haha thanks. I had to keep it all secret. It was filmed last May! Lee is a great guy and I had a 2 hour call with him showing him how to fix his 6119 seiko movement.

[@johnvaluk1401]

Thanks for the video. I have a NOS NSC digital that needs work. One day. I posted a KZbin link on the FB page for the show

[@phillipyannone3195]

Great video, loved the content and definitely the seiko machine.😊

[@Ucceah]

i never imagined early digital watches were THIS elaborate

[@andyyoung3233]

Lovin that watch Mike do some more

[@kristianklindt9203]

Saw the PanAm restoration and lovede it 👍

[@MyRetroWatches]

Thanks

[@T-Hogie]

It's amazing what you do. I wouldn't have the patience for it. Fantastic.

[@MyRetroWatches]

Thank you very much!

[@matthewakin1235]

I am still fascinated by that movement holder you use XD i keep watching on ebay hoping to see that style of movement holder show up some day.

[@MyRetroWatches]

Which the spinning one? That is on AliExpress but I also use a vintage “Star” holder that I’ve turned the bottom down so it fits the spinning holder.

[@override39]

Thank you for your video came alots of memories back

[@markehuss]

Cool old watch. All oscillators are affected by temperature. Super accurate quartz oscillators have a "crystal oven" that keeps the reference at a fixed temperature, at which it is calibrated. That temperature is maintained in future measurements to ensure maximum accuracy. Back in the day it was easier to heat up something to a target temperature then maintain it at an arbitrary temperature.

[@MyRetroWatches]

Thanks for the info!

[@zyeborm]

It's still done that way. For both time and voltage standards at least ovenised crystals and references are how it's done.

[@Nothing19800]

Wow sooo cool

[@markwade1376]

Great vid Mike, got to admit digital watches aren't really my thing but I was captivated by this one. Thanks for posting. Also I was impressed by the quality of the internals of the watch, easy to see the carry over of the way of thinking between the digital and mechanical seikos of that era.

[@MyRetroWatches]

Thanks. I have worked on many early Seiko digital and they are generally solid in their construction

[@carlm1595]

Im a broadcast engineer who also works on clocks and other timepieces as a hobby. The oven in the tester is just that, As you mentioned, the temperature affects the frequency of the quartz crystal. The oven heats the reference crystal to a fixed temperature to ensure accuracy of the time base. In Television, we use crystal time base reference in our test signal generators and frequency counters. The high end equipment use crystal ovens. By the way, the battery chemistry can create various voltages. While the case of the battery matches, the chemistry of mercury, alkaline or silver offer different voltage. The twist of the liquid crystals are voltage dependent. Using the right battery may darken the contrast of the display, I give you credit. Electronic repair is a totally different skill set. That zebra strip is crucial to getting the display to show all segments. The clamps help. I recommend that you try using a contact cleaner such as Deoxit. Contact strips develop an oxide coating that can impair conductivity while cleaning alone won't remove it. I enjoy your videos.

[@MyRetroWatches]

Thanks. I will try to repair anything that takes my interest. I had a period of doing digitals about 5 years ago and as a result gained quite a collection. I only ever use silver oxide batteries . Problem you can have is some are high or low drain and you don’t necessarily know which might be the one for the watch if there is no data sheet which there often isn’t. If you liked this one then take a look at my latest, a Bulova Accutron with a tuning fork as the regulator!

[@Jan-m5c2r]

I bought one of those back in 1979 (being 19 back then and the watch was approx £100!!!!) - I have recently given it to my son who has it up and running and loves it 🙂 Many thanks for presenting this cool watch and showing us the inside of it too. All the best!

[@MyRetroWatches]

Thanks for commenting and watching, pleased you still have one running .

[@JoseReyes-jt6ob]

Guau woow que maravilla de reloj y que maravilla el poderlo poner a funcionar nuevamente excelente trabajo muy bella pieza de los 70's. Salú2 desde Puebla México.