Established In 1735, Blancpain enjoys the esteemed difference of staying the oldest watch manufacturer on this planet. From the 1950s, it introduced the Fifty Fathoms diving watches, which were being crafted in collaboration with the French Navy's combat swimmers and soon became the normal problem on the US Navy SEALs. https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/