All,
I recently acquired a late 50's Girard-Perregaux Gyromatic with the "39" Jewel movement.
My understanding is that this is the Girard-Perregaux caliber GP 22.09. Which (apparently) is a modified Peseux 336. I have never heard of Peseux - but I haven't been in to watches all that long (at least not at the level of detail where I would know these manufacturers).
Can anyone tell me where I might find some info on this movement? I have had only modest success so far (just searching with Google).
Many thanks!
-Paul