Tissot 781-1 balance assembly.

[Tricati15]

Can anyone identify the balance assembly in the photo please?....I recently purchased it off eBay . The pin at the end of the spring ( on the said purchased one) is larger than the pins on the damaged springs, one of which is the original from the Seastar watch.  

Thanks. 

[szbalogh]

30 minutes ago, Tricati15 said:

Can anyone identify the balance assembly in the photo please?....I recently purchased it off eBay . The pin at the end of the spring ( on the said purchased one) is larger than the pins on the damaged springs, one of which is the original from the Seastar watch.  

Thanks. 

There are movements made with different stud mounts. For example Vostok 2414 has two type of hairspring mounts. 

The solution might be to repin the new spring to the old stud.

[rogart63]

You probably got a balance for a tissot 781 with adjustable stud carrier. Not sure what you can do. Doesn't look like your other hairsprings are that good.  Maybe find a balance bridge that has the right arm to fit your stud? or find a new balance. Not sure which is best or cheapest.  

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Tissot_781_1

Edited September 26, 2017 by rogart63

[RyMoeller]

The stud can be changed to fit the balance cock (assuming the balance and staff are the same).  You can purchase an assortment of studs from Cousins I believe.