Cartier Tortue W1580048

Cartier Tortue XL Perpetual Calendar Skeleton (Reference W1580048) is a highly complex timepiece that combines Cartier's signature "tortoise-inspired" design with advanced horological mastery. Its substantial 18K white gold case (typically 45.6mm x 51mm) houses the self-winding automatic caliber 9422 MC, a meticulously engineered movement visible through a stunning skeletonized dial. This exhibition dial features an intricate openwork design where components appear to float, complemented by distinctive blue hands and large Roman numeral markers. Beyond standard timekeeping, the watch includes a perpetual calendar complication that automatically adjusts for varying month lengths and leap years, displayed via a retrograde day indication at the bottom and a month/leap year subdial at 12 o'clock.