Shock Spring

[rduckwor]

Anyone have a name for this particular shock spring? Maybe even a source for spares? Elgin 712 movement.

I fear obsolete and specific to Elgin only.

Thanks,

RMD

 

 

[watchweasol]

Hi Apperrs it called  PROTECHOC   I have enclosed the ranfft  definition.

bidfun-db Archive_ Watch Movements_ Elgin 712.html

[watchweasol]

Hi there is one or two movements on the bay arround the £10 mark

[rduckwor]

Thanks, movements I have, shock springs I need.  Thanks again for tracking it down.

RMD

[JohnR725]

Didn't we have a discussion sort of like this in the past? Then in Elgin's service manual the spring and housing upper and lower is interchangeable amongst 711 being the base 712, 730 and 750.

https://www.watchrepairtalk.com/topic/13510-balance-jewels-and-end-stones

[rduckwor]

5 hours ago, JohnR725 said:

Didn't we have a discussion sort of like this in the past? Then in Elgin's service manual the spring and housing upper and lower is interchangeable amongst 711 being the base 712, 730 and 750.

https://www.watchrepairtalk.com/topic/13510-balance-jewels-and-end-stones

Yes, we did.  But the 712/714 movements got pushed to the side and superseded by more urgent jobs.  Besides, I am old and my memory often fails.  You will know soon enough!

RMD