We have aquired a Girard Perreguax watch through an estate and are not familiar with this. Any help or information will be appreciated. Our email is [Email address suppressed for privacy] Thank you for your time.
The watch has the numbers on the back of F 4642 JA....Inside the back cover the watch says 360-353 8 jewels swiss unadjusted. The back cover says Fond acier lunette plaque or G10 with a design. Any help would be appreciated..

