Girard Perregaux

hello, my first post here! a couple of pics of this rare bird I recently acquired. hope you like! ...  

I like your GP for the fully.

...geross, its 36mm in dia, ( my preferred size ) The original crown is just a push in. but it does have a screw down watch back cover Here's a pic I took today on a leather strap. I must say for a 'deep diver' its rather elegant! ...  

Any idea which time period this watch is from?

1st Execution of Girard Perregaux Gyromatic Deep Diver. Rather rare as I read that less than 10 examples are known. ( I've no idea if that is correct though) ...