Skeleton Movement Tourbillon Watch for Men Sapphire Glass 7016

Product parameter: 
Movement: Original tourbillon skeleton movement 
Waterproof: 100M 
Watch mirror: synthetic sapphire 
Strap material: first layer cowhide 
Dial features: double-sided hollow design 
Case material: stainless steel 
Dial thickness: 12mm  
Dial diameter: 42mm  
Frequency: 28800Hz/Hr 
Energy storage: 40 hours 
Travel time error: ±10 seconds/day 
Warranty : 1 years