Help identify this Girard-Perregaux
By: e.m.erdmann : April 6th, 2021-10:51
This GP was made sometime in 1955-56. The model number is 6859 but that’s all I have been able to find out. I have been searching the internet for years and have never seen one with a faceted bezel like this. GP cannot tell me if this watch is unique, or ...