Bringing the unique aesthetic of a prototype developed by the brand 50 years ago back to life, this Tudor Black Bay P01 is a cross between a diving watch and a sailing watch. At A Glance  Brown leather strap 42mm stainless steel case with 200m water resistance Unique 60-notch, 12-hour graduated bidirectional rotating bezel with stop system at 12 o’clock Scratch resistant sapphire crystal Black dial with dot and baton hour markers Date window at 3 o’clock Powered by the Manufacture Calibre MT5612 (COSC) Self-winding mechanical movement with bidirectional rotor system Minimum power reserve of 70 hours