Tudor Black Bay One 31 S&G

The Tudor Black Bay One 31 S&G, reference M79603-0006, has a 31mm steel case with a polished and satin finish. Case thickness measures 9.5mm, and the lugs take a 17mm strap or bracelet. A fixed bezel in solid yellow gold sits above a black dial with diamond hour markers, set with diamonds, and viewed through a flat sapphire crystal. The self-winding manufacture calibre MT5201 is a chronometer, with a power reserve of approximately 50 hours. A screw-down crown, capped in yellow gold, protects the movement, and central seconds track the running time. The steel and gold bracelet closes with a folding clasp finished in the same combination. It stays water resistant to a depth of 100 metres.