Cartier Santos Skeleton Series Debut SF Creates the Strongest 1:1 Replica. Parameters Sync with Authentic Model: Case Diameter 39.8mm, Movement Swiss Ronda 4S20 Modified Quartz Movement, Case Thickness 9.08mm, Dial Color Skeleton, Dial Shape Square, SKU: Black, Silver with Silver Circle, Silver with Rose Circle, Silver with Gold Circle. Strap Colors: Black, Blue, Brown, Green, Made of Imported Calfskin. Buckle Type: Double Folding Clasp. Transparent Case Back. Sapphire Crystal. Hands: Blue Burnished Steel Hands. Black Model with Luminescent Features Uses Imported Green Luminous Material. Crown: Gem-Embedded Crown by ZY Production.