42 mm steel with 18k yellow‑gold bezel; 1847 MC automatic; black/silver dial by execution; leather strap; Ronde Croisière de Cartier: 42 mm case with ADLC‑style fluted bezel, automatic Manufacture 1847 MC, swept‑back lugs, large Roman numerals; sapphire crystal; typically 100 m WR; leather or bracelet options.