Case: Case Size 3H-9H: 40mm Case Size 12H-6H: 46.1mm Case Material: Stainless Steel Caseback Design: See-through Caseback Caseback Structure: Screw Caseback Glass Material: Crysta Glassl Glass Material: Caseback: Crystal Glass Movement: Automatic Self-Winding: Yes Jewels: 24 Jewels Vibration: 21,600 vibrations/hour Hand Winding: Yes Movement: Mechanical Caliber Code: Cal.F6S22 Made in Japan Feature: Second Hand Halt Mechanism: Yes Water Resistance: 100m