Rotonde de Cartier Day and Night watch, retrograde moon phases, 43.5 mm, Manufacture mechanical self-winding movement 9912 MC. Case in palladium, beaded crown in palladium set with a blue sapphire cabochon, white galvanized guilloché dial, silvered grid with transferred black Roman numerals, apple-shaped minute hand in blued steel, moon-phase retrograde hand in the form of a lunar crescent in blued steel. Strap in black alligator skin, double adjustable folding buckle in 18K white gold. Complication indicators day and night with retrograde moon phases. Individually numbered movement containing 290 parts including 44 jewels. Total diameter of movement: 30 mm, thickness: 6.44 mm, balance: 28,800 vibrations/ hour, power reserve approx. 48 hours. Sapphire crystal and case back. Case thickness: 12.77 mm. Water-resistant to 3 bar (30 meters).