Case: Case Size 3H-9H: 41.5mm Case Size 12H-6H: 47mm Case Material: Stainless Steel Caseback Design: See-through Caseback Glass Material: Crystal Glass Pair: RA-KB0005E Movement: Automatic Self-Winding: Yes Jewels: 22 Jewels Vibration: 21,600 vibrations/1 hour Hand Winding: Yes Movement: Mechanical Caliber Code: Cal.F6L24 Made in Japan Feature: Second Hand Halt Mechanism: Yes Water Resistance: 30m