Seiko 6139 Service Tutorial Part 1 - Disassembly of The Calendar Works

Hello, This is episode one in series covering the disassembly & then the assembly of a iconic vintage Seiko movement 6139. This video is on the 6139B version but don't worry if you have a 6139A you can still follow along as there is only a very slight difference.
This first episode I will remove the movement from the case, remove the hands and dial and all of the calendar & motion works right back to the main plate.
I do find some problems along the way which shows that some watches are full of surprises!

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[MyRetroWatches]

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[a.aguilar]

Long awaited video Mike, now I'm looking forward for the rest of this series so I can buy and service my own 6139.

[happyfeet]

I imagine, for the pros, this is probably day-to-day stuff - but this set of videos gave me the confidence to have a go at [admittedly, very basic] repairs on my Seiko 6139-7100 (which, ordinarily, I'd not have done given, for my modest budget - and even though there's some aftermarket parts on it - it's one of the more expensive watches in my collection). As such, all went well - so many thanks for all your videos, Mike. They're really appreciated.

[cooperredmon]

This video was super helpful in figuring out how to fix the chronograph on my $3 6139-6019 from a local thrift store. It was extremely clean inside, but the chronograph was inoperable and it lost about an hour a day. The chronograph reset was stuck, causing the movement to stop when I tried to activate the chronograph. I was able to get the thing apart and jiggle the piece that the reset button contacts until it came free and started working again. I’ll be referring back here if there’s anything else I need to do to it. Thanks for posting!

[SpaghettimanJohnsonJr.]

Very informative video, helped me take out the movement to get rid of some haze on the back of the Crystal, as well as clean up some gunk off of the crown and pushers. Now I can easily change the day & date, and see my dial clear as day. Thank you!

[jeffintoronto]

It's great but a bit nerve racking to see my watch being taken apart. The adhesive looks horrible but I guess if it didn't get into things and foul them up, it sort of did its job. Great job Michael!

[paulwilson]

Thank you, I want to learn as much from you as possible. This is my goal 🥅. To be a watchmaker like 👍🏼 Mike. I am retired and 67 yo. Needed a hobby. At it 4 months

[dennisc.]

Man, that watch is dirty with a lot of DNA. Like always awesome job on this video.

[dodgydruid]

Watching this whilst rebuilding my 2428 Slava "tv", got a new movement for it so currently dissecting the old one as it was locked solid by the top balance jewel coming out of its socket and jamming the gears. Broke the top balance staff pivot sadly but the gear train survived with no damage to the teeth and the watch is free again. Putting together a rebuild vid and just finished bathing the bits removing 1970's dna and what looks and smells like earwax hehe

[orchardwatchandclockrepair]

I think that is a great bit of video and interesting. Top marks.

[JonTheComputerDoctor]

I take it you have the correct movement holder for hand setting?
Chrono hands are keyed on these.
Great video.

[Bobbycat]

Hay just found your channel and fined it so interesting .I have been a Seiko owner since the mid 70's
I just found my old sports 100 in a box of junk that had the hardest life as a welder mechanic .I had the
watch rebuilt 4 times .Had a dozen bands on it and the pin holes are right wore out it had been retired the
last 15 years that it last run .I thought I would put a new battery in an it fired right up so I got looking on
line for a new band and found a good complete none runner so it is on the way I will swap out the
works and keep it going again #7123-824LR Gold face So I own a lathe and have a tool and die shop
at home so my new hobby is to make all the tools to work on my watches .Thanks to you.

[fredchainring]

I have a 6139 6002 that I bought when I was in the USN and over in Philippines. It just about looks like new, except the two buttons for stop/start and reset are sticking and hard to push, etc.. I popped them out, thanks to your video, and both have springs. Is there a lubrication recommended, or will this require more in-depth service? The watch works fine with the exception of the start/stop reset. I'm hesitant to go from functional to trash can! thanks!

[MrTech]

There is dial feet repair tool from Ali express!

[adrianbirkett]

Nice one Michael, was that calendar wheel bent?. Did you check mechanics under micro?. Since I got my micro I can not believe the information I can get just from viewing through micro, thanks to you. I replaced a battery in my wife's watch, replaced the back with a home made press and broke the glass!!! 😭. Frantic to find replacement, god its cold in the dog house!! 😂😂🐶. Enjoyed video, thanks. Adrian

[Tapperlite]

What kind of tool do you use to get the back off?

[ajaychoudhary]

amazing as always


what are you views on the seiko 7019a movement

[lazaroskotsidis]

Great video, like always, sir . I would like to ask you, where do you source parts for your movements?

[peterfowler]

I have Seiko kinetic watch that worked about 4-5 months and it has stopped working altogether is there any thing I can do

[garrycope]

Hi Michael, please could you tell me where you got the british made watch holder/stand from please?