42 mm 18k rose gold; automatic movement (Cartier calibre 049 by era); silvered dial; alligator strap; Ronde Solo de Cartier: steel bezel, silvered opaline dial with Roman numerals, railroad minute track with 24‑hour ring, blued sword hands, beaded crown with synthetic spinel, sapphire crystal; ~30 m WR; bracelet or alligator strap.