Ronde Must de Cartier watch, 42 mm, mechanical movement with automatic winding, calibre 1847 MC. Steel case, beaded crown set with a synthetic cabochon-shaped spinel, sandblasted silvered dial, blued-steel sword-shaped hands, sapphire crystal, steel strap fitted with an interchangeability system. Thickness: 9.62 mm. Water-resistant to 3 bar (approx. 30 metres).