Rotonde de Cartier Astrocalendaire watch, tourbillon and perpetual calendar, 45 mm, Manufacture mechanical self-winding movement 9459 MC. Case in platinum, beaded crown in platinum set with a blue sapphire cabochon, silvered galvanised guilloché dial, silvered grid with black transferred Roman numerals, sword-shaped blued-steel hands. Strap in black alligator skin, double adjustable folding buckle in 18K white gold. Circular-display perpetual calendar and tourbillon complications, watch certified “Poinçon de Genève”. Individually numbered movement containing 382 parts including 51 jewels. Total diameter of movement: 32 mm, thickness: 8.1 mm, balance: 21,600 vibrations/hour, power reserve approx. 50 hours. Sapphire crystal and case back. Case thickness: 15.1 mm. Water-resistant to 3 bar (30 metres).
The Rotonde de Cartier collection showcases the most advanced movements in Cartier Fine Watchmaking: the Astrorégulateur, minute repeater, Astrotourbillon and skeleton grande complication.