A small history of watches and a few advices for buying the perfect watch. Black Bay P01, 42mm satin-finish steel case, brown leather, rubber and steel hybrid strap. Based on a 1967 prototype watch for US Navy divers codenamed the “Commando” which was not accepted into service, Tudor has now raided its archives to expand its ultra-successful Black Bay range with this unusual tool watch based upon that blueprint. Uniquely built for the world aquatic where underwater and surface exploration merge, the hefty P01 is rated waterproof to 200m while its bi-directional bezel is marked off in hours for navigating …