Tudor Black Bay 58

Tudor's Black Bay 58, reference M7939A1A0NU-0002, is a dive watch with a 39mm steel case. The case measures 11.7mm thick and carries a unidirectional rotating bezel in steel with an anodised aluminium insert. A domed sapphire crystal sits over the matt black dial, which has applied hour markers and luminous hands and indices. Inside is the self-winding Manufacture Calibre MT5400-U, a chronometer certified to Master Chronometer standard with a 65-hour power reserve. Central seconds and a screw-down crown round out the specification. The steel bracelet closes with a folding clasp. The screw-down crown helps hold the case to its 200 metre water resistance rating.