Case: Case Size 3H-9H: 41mm Case Size 12H-6H: 49mm Case Material: Stainless Steel Caseback Design: See-through Caseback Caseback Structure: Screw Caseback Glass Material: Sapphire Crystal Glass Glass Coating: Super Anti-Reflective Glass Coating Glass Material: Caseback: Sapphire Crystal Glass Movement: Automatic Self-Winding: Yes Jewels: 22 Jewels Vibration: 21,600 vibrations/hour Hand Winding: Yes Movement: Mechanical Caliber Code: Cal.F7M65 in Japan Feature: Power Reserve Indicator: Yes (50H) Second Hand Halt Mechanism: Yes Date: Yes Water Resistance: 5bar(50m)