42-mm titanium and steel case with polished and satin finish. Smooth steel bezel. Self-winding mechanical movement, Caliber T401 with additional alarm function mechanism developed exclusively by TUDOR. Steel winding crown at 4 o’clock, engraved with the TUDOR rose Steel winding crown at 2 o’clock for the alarm function, engraved with Heritage Advisor Steel pusher at 8 o’clock to activate the alarm function. Black alligator leather strap with folding clasp and safety catch. Waterproof to 100 m (330 ft)