Case Size 3H-9H : 43.5mm Case Size 12H-6H : 50.2mm Case Material : Stainless Steel Caseback Design : See-through Caseback Caseback Structure : Screw Caseback Glass Material : Crystal Glass Glass Material Caseback : Crystal Glass Movement : Automatic Self-Winding : Yes Jewels : 21 Jewels Vibration : 21,600 vibrations/hour Hand Winding : Yes Movement : Mechanical Caliber Code : Cal.F6D22 Made in Japan Feature : Second Hand Halt Mechanism : Yes Day : Yes Date : Yes Water Resistance : 5bar(50m)