Cartier CARTIER Santos Skeleton Series debuts in SF to create the strongest 1:1 replica parameters and synchronizes with the original watch diameter 39.8 mm movement Swiss Ronda 4S20 modified quartz movement case thickness 9.08 mm dial color hollow dial shape square SKU black Silver silver ring Silver rose ring Silver gold ring strap color black blue brown green (imported calfskin) Buckle type double folding buckle back see-through back lens sapphire mirror pointer blue burnt steel blue pointer black model uses imported green light Crown gem-set crown, real photo taken,