HAOFA Double Barrel Tourbillon 1917 Watch 72 hours power Convex Sapphire Mirror

Movement: manual tourbillon movement
Movement model: CAL.3H41
Vibration frequency: 28800 times/hour
Drive: double barrel
Power reserve:72 hours
Winding method: manual winding
Case diameter: 47mm
Lug to Lug: 53mm
Case thickness: 11.9mm
Case material: 316 stainless steel
Case material: belt + rubber
Strap width: 26-20mm
Waterproof depth: 50M life waterproof
Mirror: synthetic sapphire mirror
Warranty: 2 years
Clasp type: folding buckle

•  Double Barrel Tourbillon
•  High Quality Polishing Case and Beveling
•  Convex Sapphire Mirror 
•  Sapphire Dial