Valjoux 7750 12 hour sub hand moving?

[rogart63]

Have a 7750 where the 12 hour sub hand is moving when the chronograph isn't going . Can't find any adjuster . Everything looks okay. Anyone know where to start looking.  

[nickelsilver]

How old is it? Really old ones had smooth brakes that didn't always hold, later ones have toothed brakes. Otherwise just make sure the wire spring that holds it all tog3is properly engaged

[rogart63]

50 minutes ago, nickelsilver said:

How old is it? Really old ones had smooth brakes that didn't always hold, later ones have toothed brakes. Otherwise just make sure the wire spring that holds it all tog3is properly engaged

No idea. It's a Bell &  Ross watch made by SINN . But probably know what is the problem . A nice guy sent me the manual from ETA . I think it's the hour counter lock that is broken or worn . It's made of plastic. https://www.eta.ch/swisslab/7750/7750.html?fbclid=IwAR00lH1HT0iS7fTIUAqSKrXyx_ymQBIBup7g9be7Z5zne1-6PhhDzcACiDg

 

Edited July 31, 2019 by rogart63

[Nucejoe]

6 hours ago, rogart63 said:

No idea. It's a Bell &  Ross watch made by SINN . But probably know what is the problem . A nice guy sent me the manual from ETA . I think it's the hour counter lock that is broken or worn . It's made of plastic. https://www.eta.ch/swisslab/7750/7750.html?fbclid=IwAR00lH1HT0iS7fTIUAqSKrXyx_ymQBIBup7g9be7Z5zne1-6PhhDzcACiDg

 

Hi Roger, I have a VAL 7750 movement, the part you need should interchange with ETA 7750. 

I don,t personally download any software, this task is for Ipad hospital.Do please send me a pic of the part, be happy to send you the one off of this movement.

Regards joe

[rogart63]

10 hours ago, Nucejoe said:

Hi Roger, I have a VAL 7750 movement, the part you need should interchange with ETA 7750. 

I don,t personally download any software, this task is for Ipad hospital.Do please send me a pic of the part, be happy to send you the one off of this movement.

Regards joe

Thanks  Joe .I take one from cousisnuk . Cost is only £4  so no big value. It's a nylon part so  putting in a new part  is probably the best . Someone said a should change the spring for the hammer also . But  not sure it's necessary?  Cost is an other £5 

 

[Nucejoe]

The brands name alone is worth spending extra to keep in it in top shape.

A piece off of my valjoux is plastic too, I presume we are talking the same piece. I owe you and be more than happy to gift wrap the parts you need.  

I am not sure if I can read your hand writing on the package you sent me. Should you decide on used pieces,  do please send me your address printed.

Best Regards joe

 

 

[CaptCalvin]

8 hours ago, rogart63 said:

Thanks  Joe .I take one from cousisnuk . Cost is only £4  so no big value. It's a nylon part so  putting in a new part  is probably the best . Someone said a should change the spring for the hammer also . But  not sure it's necessary?  Cost is an other £5 

 

Wouldn't know for sure unless we open it up. Weak or broken spring would also cause this problem. Would probably bet on it being the brake though.