Hi Katt,
I understand you don't work on 7750 movements, but do you work on the case tubes or stems? I have a Breitling Super Ocean Heritage chrono with a stripped tube- the crown will not screw in and stays in the wind position. I also have a Pam 162 with what I think is a broken stem- I cannot set the time or wind it. just lock the crown only.The movements on both are fine, just wanted to know if this is something you can repair/replace.
Also, I have some Asian 21J watches and wanted to see if you're interested in them for parts. They all function but are in fantasy cases. I can email or send you photos if you'd like.
Thanks