Help Identifying Vintage Seiko Quartz Movement

[BobHadababyitsaboy]

I'm having trouble trying to find a replacement for this old Seiko (1970's I believe?). Can't seem to find any info online about it. Apparently the movement number is 41A, but that also seems to be the movement number for the Grand Seiko Automatic, so I'm quite confused. It has 3 jewels, and takes a 386 battery, if that helps. Thanks!

 

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[Blacklab]

From the little info I can find they were first produced in 1974, the one you have puts as a September 1975 model. Parts list Seiko 41A.pdf more parts are listed here: http://cgi.julesborel.com/cgi-bin/matcgi2?ref=SEK_CS^4100-6007

[BobHadababyitsaboy]

Thanks for the info, Blacklab. So basically it seems that there is no complete movement to replace this one with, I'm assuming? The seconds hand just twitches and won't move, and an overhaul/cleaning of a quartz movement surely wouldn't be worth the time, yeah?

[Blacklab]

Give it a go, its always good for practice. If you cant get it to work see if you can find a suitable replacement movement.

[Geo]

I purchased one of these http://www.ebay.co.uk/itm/290865438546?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT back in April and have kick started a couple of quartz watches with it. When checked with this it indicated that the oscillator was ticking away nicely but the movement wasn't running. This unit can put a burst of energy into the watch that frees off the movement and makes it spin very fast.

The two watches I started with it back in April this way are still running and keeping perfect time. Even if you are not keen on using this technique to start the watch, you can still check that the electronics are OK with it before servicing the movement. This would save wasting time on a watch watch that cannot possibly run, even when cleaned.

[JohnR725]

The seconds hand just twitches and won't move, and an overhaul/cleaning of a quartz movement surely wouldn't be worth the time, yeah?

Interesting question is it worth the time to service/clean the watch? I suppose it depends on how much your time is worth? 

 

So Seiko has a parts list which means the watch can be disassembled. Then at the link below you'll find the Technical guide everything you need to know about servicing this movement.

 

http://www.phfactor.net/wtf/Seiko%20Files/4100A&4110A.pdf

[BobHadababyitsaboy]

Very good info and resources! Thanks guys!

[ricardopalamino]

 I found this donor in a search...