TUDOR Black Bay One 31

31mm steel case, Steel bracelet
CASE: 31mm stainless steel case with polished and satin finish
BEZEL: Stainless steel bezel with polished and satin finish
MOVEMENT: Manufacture Caliber MT5201 (COSC), tuned to -3/+5 seconds Self-winding mechanical movement with bidirectional rotor system
DIAL: Light champagne-color
WINDING CROWN: Screw-down crown with the TUDOR rose in relief
CRYSTAL: Flat sapphire crystal
WATERPROOFNESS: Waterproof to 100m (330 ft)
BRACELET: Stainless steel bracelet, polished and satin finish, with TUDOR “T-fit” folding clasp and safety catch