36 mm 18k rose gold; hand‑wound calibre 430 MC; approx. 7–8 mm thick; alligator strap; Ronde Louis Cartier: precious‑metal case, beaded crown with sapphire cabochon, silvered dial with Roman numerals, blued sword hands; sapphire crystal; ~30 m WR; alligator strap; manual‑wind Manufacture calibre 430 MC.