Sapphire crystal, rubber strap with folding clasp.

Movement: H25.01r manual tourbillon

Model: 1903-H

Drive mode: single spring drive

Power reserve: 50 (hours)

Vibration frequency: 21600 (times/hour)

Winding method: manual winding

Jewel Bearings: 21

Case thickness: 16.5mm

Strap width: 20-25.5mm

Case Material: carbon fiber material

Strap Material: Rubber

Waterproof depth: 3ATM

Glass material: synthetic sapphire crystal

Buckle style: Butterfly double snap

Crown: Straight