The Ronde Solo preserves the perfectly pitched classical elegance and signature Cartier features of the Ronde de Cartier watch that serves as its inspiration: Roman numerals, blue sword-shaped hands, winding mechanism crowned with a sapphire and rail-track minute circle. The Ronde Solo watch features a steel version of the bracelet. Ronde Solo de Cartier watch, small model, quartz movement. Case in 18K rose gold and steel, beaded crown in 18K rose gold set with a synthetic cabochon-shaped spinel, silvered opaline dial, Roman and Arabic numerals, sword-shaped hands in blued steel, sapphire crystal, strap in round-scale alligator skin, ardillon buckle in 18K rose gold. Case dimensions: diameter: 29. 5 mm, thickness: 6. 35 mm, water-resistant to 3 bar (approx. 30 metres).