Cartier Ronde de Cartier 2873

Case Round case in 18k white gold, polished, fixed bezel in 18k white gold, polished, sapphire caseback fixed on 8 screws, crown at 3 o’clock with sapphire cabochon Strap Black alligator strap, Cartier double folding clasp in 18k white gold, original Dial Matt silvered dial, signed Cartier Paris, ‘lotus’ guilloche motif, printed Roman numerals for the hours and Arabic numerals for the minutes, blued retrograde Breguet minute hand, rotating upper segment of a dial with semicircular window depicting the starry sky (as night) and the sun (as day) to show the hour Movement Hand-wound mechanical movement, rhodium plated, bridges with laser engraved double-C logo, mainplate with perlage, blued C-shaped index adjuster, functions: hours, 24-hour day/night indication, retrograde minutes Cal. 9903 MC Ref. 2873 I (W1550151) Movement No. 138 Case No. 138 D= 42 mm