Dial diameter: 37 mm. Integral middle case, screw-down case back and winding crown. Bidirectional rotatable 60-minute graduated bezel with raised numerals. Screw-in triple interlock triple waterproof system. Scratch resistant sapphire, Cyclops lens calendar window. Water resistant to 100 meters/330 feet. Permanent, mechanical, self-winding movement. Power reserve: 55 hours. Water Resistance: 100 meters �C 330 feet. Clasp Type: Folding Oysterlock with Easylink 5 mm Comfort Extension.