Watch Movement ST3600 Manual Mechanical Skeleton Silver Hollow Carved Repair Part. Item Type: Mechanical Watch Movement. Movement Type: Manual Winding Mechanical. Caliber Diameter: 37.20mm. Movement Height: 4.30mm. Frequency: 3 Hz / 21,600 VPH. Seconds Position: Independent Small Seconds at 9 O’Clock. Design: Skeleton / Hollow-Out Carved Flower. Battery: No battery required. Application: Watch Repair, Replacement, Restoration & Modification. Please verify the 37.20mm diameter, 4.30mm height, mounting dimensions, stem position, hand sizes, dial layout, and case clearance before ordering. Compatibility should be confirmed with your existing watch case, dial, hands, crown, and other components. This is a precision mechanical movement. Professional installation is recommended. Package includes the movement only. Watch case, dial, hands, crown, stem, and other accessories are not included. 1 × Mechanical Watch Movement.