Tudor Black Bay One 31 S&G

The Tudor Black Bay One 31 S&G, reference M79613-0007, has a 31mm steel case with polished and satin finish. The case measures 9.5mm thick, and the fixed bezel in solid yellow gold is set with diamonds. A flat sapphire crystal covers the champagne dial, which carries diamond hour markers and luminous hands and indices. Inside is the self-winding manufacture calibre MT5201, a chronometer with a power reserve of about 50 hours. The screw-down crown is steel with a yellow gold cap bearing the Tudor rose. The bracelet combines steel and yellow gold links and closes with a T-fit folding clasp in the same materials. This screw-down crown also helps keep the case water resistant to 100 metres.