, air tourbillon mechanical watch, leather strap, butterfly buckle, artificial sapphire mirror, one-piece case CNC engraving, Italian calfskin, full of texture, comfortable and breathable, 5000 times of opening and closing test, durable and firm, double artificial sapphire mirror, hardness up to Mohs grade 9 is second only to diamond, transparent, bright, wear-resistant and scratch-resistant.

Movement: Flying Tourbillon

Movement Model: CAL.008.10

Vibration Frequency: 28800 (times/hour)

Drive: single-spring drive

Power Reserve: 42 (hours)

Winding Method: manual winding

Case Material: 316 stainless steel

Jewel Bearing: 19

Strap Material: Italian calfskin

Case Diameter: 41mm

Waterproof Depth: 30 meters life waterproof

Case Thickness: 12.5mm

Mirror: Synthetic sapphire

Strap Width: 22mm