Girard Perregaux 1st military watch in the world for the Imperial Navy in 1880

By order of the German Navy, Girard-Perregaux had already delivered around 2000 examples of a splash-proof genuine gold wristwatch with a diameter of about 11 lignes, which was to be worn on a metal chain bracelet.

This was the first known military watch in military watch history. Not a single example of this series is known or preserved

Girard Perregaux has offered a reward of 1 million dollars for whoever finds 1 original example from this series

Girard-Perregaux was ahead of its time when introducing the wristwatch

Sources: Konrad Knirim "Military Timepieces", Wikipedia, Internet