Is it Blancpain 50 in 2023? The 70th anniversary of its birth, in the early 1950s, the diving field was still in its infancy. Colonel Robert Ma Loubiere and Captain Claude Rift, who were in charge of preparing the Frogman diving commando, tested the watches on the Paris market at that time. They were either too small in size or too waterproof. At the same time, Jean-Jacques Fichte, then CEO of Blancpain, made great efforts to build a diving watch suitable for this sport with his love of diving and rich diving experience. He met two French officers in Switzerland and they brought back 50 pounds? After testing, the watch sample successfully passed the comprehensive test and became the core diving watch of the French frogman diving commando. Fifty? Three unique innovative designs of watches have been patented in many countries, namely, lockable rotating bezel, double-layer case and double O-ring crown system. Excellent water resistance, solid double-sealed crown, self-winding movement, dark dial with luminous indication, one-way rotating bezel and anti-magnetic protection function. Watches have become necessary equipment for divers to perform underwater tasks. Fifty? The excellent performance of this watch quickly gained wide recognition and was adopted by the US Navy SEALs, German and Israeli navies. Blancpain fifty? The seven standards formulated are still in use today, and the title of the originator of diving watches is well deserved.