HAOFA Automatic Tourbillon Double Spring watch 1931

Product Description

Brand : Haofa Tourbillon Watch
Movement: Automatic flying tourbillon Movement
Movement model: Cal.3HD3
Vibration frequency: 28800 (times/hour)
Drive: Double-winding drive
Power reserve: 72 hours
Winding method: Automatic Winding
Gem bearing: 35
Case diameter: 41mm
Case thickness: 13.5mm
Strap width: 21mm
Case material: 316 stainless steel
Strap material: Italian calfskin
Waterproof depth: 30 meters life waterproof
Mirror: Three-dimensional synthetic sapphire mirror