39 mm stainless steel case, satin-finished Movement Manufacture Calibre MT5402 (COSC) Self-winding mechanical movement with bi-directional rotor system Power reserve of approximately 70 hours Screw-down winding crown in steel with embossed TUDOR rose Water-resistant to 100 m (330 ft) Bezel Smooth, satin-brushed steel Dial Black, domed Domed sapphire crystal Steel bracelet with three links and a folding clasp with TUDOR "T-fit" safety catch.