Cartier Santos Skeleton Series debuts SF to create the strongest 1:1 replica parameters and the original synchronization. Table diameter 39.8 mm movement Swiss Ronda 4S20 modified quartz movement Case thickness 9.08 mm Dial color Skeleton dial shape Square SKU black silver silver Silver rose ring, silver gold ring, strap color, black, blue, brown, green (imported calfskin). Clasp type, double folding clasp. Transparent back lens. Sapphire mirror. Pointer. Blue burnt steel. Blue pointer. Black model. Luminous. Imported green luminous crown. Gem-set crown produced by ZY,