Any differences in 17 jewel 7750

[elconquistador]

I am putting together a Tudor that needs a Swiss 7750 to fit the hands.

Are the hand sizes the same in the older 7750's vs the 25 jewel 7750s?

 

[peterpl]

I'm after this info as well. Anyone?

I want to put an ETA 7750 for some reps I have to replace the A7750s. Do the hands need modding?

I know with the new ETA7750s (28,800bph) the hands need to be modded to fit.
Just need confirmation that the older 21,600bph 17 jewel versions don't need any mods to the hands.

Cheers

 

[chaw6125]

If you are talking purely Swiss:

The 17 jewel version is the same as the 25 jewel version except for the auto winding module. That is where the extra 8 jewels are as far as I know. It is still 28,800vph and has the same hand sizes.

I don't know if it affects the service frequency but won't affect timekeeping or the actual build itself much.


Sent from my iPhone using Tapatalk - now Free