Case diameter: 49mmx42mm Case thickness: 14.5mm Lug to Lug: 49.5 Movement: E.3H41Automatic Tourbillon Movement Vibration frequency: 28800 (times/hour) Drive: Double spring drive Winding method: Automatic winding Gem Bearings: 35 Bezel material: Carbon fiber Case Material : Titanium-magnesium alloy Strap material: Rubber Waterproof depth: 50m life waterproof Mirror back cover: Artificial sapphire
Model 1901-1 Features： Automatic Tourbillon Movement Free-sprung balance Carbon Fiber Bezel Double Barrel 72 Hours Power Titanium-magnesium Alloy Material Case
