Haofa Automatic Tourbillon Double Spring 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
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
Model 1931 Features：
- Automatic Tourbillon Movement
- 72 Hours Power reserve
- Double Barrel Tourbillon
- High Quality Polishing Case and Beveling
- Convex Sapphire Mirror
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