Haofa Automatic Tourbillon Watch 1930

Movement: automatic mechanical tourbillon
Movement model: 3HDO
Vibration frequency: 2880O (times/hour)
Drive: double clockwork drive
Power reserve: 72 (hours)
Winding method: automatic winding
Gem bearing: 36
Case diameter: 41mm
Case thickness: 13.5mm
Strap width: 21mm
Case material: 316 stainless steel
Strap material: cowhide
Waterproof depth: 30 meters life waterproof
Mirror bottom cover: Three-dimensional artificial sapphire glass