Hello, I have a Girard-Perregaux and would like to know more about the background of it. The Museum Curator from Girard-Perregaux (GP), a division of SOWIND SA, replied that no doubt that the watch is authentic. Unfortunately, the number engraved on the case back does not correspond to those of their files. So he cannot give me an exact info. However, as obviously the watch has especially been produced for the Royal Air Force (RAF), it is possible that it received a special numbering. After the design and the movement (no shock absorber), he should say that it dates back to the late 1940’s. He checked in his files again he did not find any track of a document between GP and RAF. He added that it may be possible that this business was organized by their former agent. Your input is much appreciated.