Ronde Must de Cartier watch, 40 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, black strap (made without animal materials), steel folding buckle. Thickness: 9.62 mm. Water-resistant to 3 bar (approx. 30 metres).