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Tissot Seastar - Refresh and service

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Hi guys,

Started to work on the Tissot Seastar I posted below..


I received this watch at my weekend home and didn't have any tools handy so I started on cleaning up the case. (I borrowed the use of a case-back opener from a local store).


Here's how it looks in the beginning, You can see that the chapter ring is separate and has come adrift.


Beginning sanding with some fine sand-paper.. I started with some used 1000 grit..


And progressed onto finer grade.



Getting better.. autosol is my preferred polish..they key is to keep using fresh polish paste and move to a fresh area on your cloth. Otherwise you'll be polishing plastic with plastic.



The bezel cleaned up but theres a lot of scratches...way better than before though.


You can see some scratches but with the naked eye its not too bad. That'll do for now.


One of the lugs had seen some damage.


A little light tapping had it looking better, here the springbars and case have been cleaned and the bracelet installed. I may get around to polishing the rear, more to get the scratches off but I may remove the engraving. I'm in Malaysia and Hebrew words won't help if I decide to sell it.


Hands and dial are pretty clean. Looks like the case kept all the dirt on the outside, kudos to Tissot.


A light coat of dust.


At first glance the movement is nice and clean, it tries to tick .. hopefully a clean and service will see it right. I'm a bit cautious with these Tissot movements as I have had a few problems with these movements (2571). For one thing the centre wheel pinion where the seconds hand goes is quite fragile. I have broken a few.. probably because the hand-puller was not absolutely at right angles... but I dont have this problems with other watches!. Also the I have broken the Inca spring on a few Tissots but never on any other brand of watch. (KIF are another story!). Perhaps its just co-incidence but as a result I remove hands and balance jewels with extra care!




coming up.. servicing the movement.




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ll I took a few pictures during the strip and rebuild..

First the automatic weight comes off..


Then the automatic module.. simple enough. Note below that tone of the screws holding down the autowinding mechanism also holds the winding wheel in place.

With the automatic weight off the watch tries to run..



Now I flip it over to work on the dial side..


Everything comes apart well. The set lever bridges is intact. The quickset lever is also present, this can go missing as its not immediately recognizable in the parts tray!


Back to the other side to get the train and barrel off..


A naked mainplate



I didn't get a picture of the wheels.. sorry.

Here's a picture of the movement re-assembled. In this case theres not much difference before and after as the case did a good job keeping crud out!.


And here's a video.. happily ticking away!




Edited by anilv

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3 hours ago, tmag101 said:

My Tissot 'Seastar Pr 516 GL looks like this one.  Mine seems to run when worn but. the time is tough to set and date does not set..  Am I into a large repair?  Or is it as easy as a winding stem?

A regular service should do. BTW, we have a section were it's considere polite to introduce oneself, and please don't unnecessarily hook into existing project topics just because you have a same  watch.

Edited by jdm

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The setting works could be gummed up, also the date quickset is a 'push crown in' type. If you dont know when its been serviced then it would be a good idea to get it done.


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What a surprise seeing this model and face on here right as I'm getting back into this after a break. I've got the same model and I've always had a hard time finding ones exactly like it with the same color combination. I haven't done a full service of it yet but I have replaced a loose cannon pinion. The push-in date set complication has given me the most trouble of any watch to date, which is probably why I haven't taken it fully down for a service. It took me 4 or 5 tries until I got it together without something slipping out stopping the date advance from working.


Great work!

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