Convex sapphire crystal with anti-reflective coating on both sides
Sapphire-crystal case back
Water-resistant to 30 m (3 atm)
Diameter 43.1 mm
Height 11.57 mm
Hand-stitched Louisiana alligator leather in dark brown
folding pin buckle in 18 k yellow gold
It is revered as the highest achievement in watchmaking: the tourbillon. Only a few masters of the craft can lay claim to the delicacy and absolute accuracy that must come into play to build a tourbillon.