MOVEMENT: Custom Built Automatic Skeleton Movement with Detailed Rotor Engravings CASE DIAMETER: 40mm THICKNESS: 8.3mm DIAL COLOR: Skeleton Dial CASEMATERIAL: 904L Stainless Steel BRACELET: 904L Stainless Steel with Deployant Clasp FRONT GLASS: Scratch-proof sapphire crystal with AR coating CASE BACK: Display case back BEZEL: Carbon Fiber bezel CLASP TYPE: Stainless Steel Deployant Clasp