Niobium-titanium case with a black alligator leather strap. Fixed bezel. Slate guilloche dial with blue sword-shaped hands and Roman numeral hour markers. Minute markers around an inner ring. Dial Type: Analog. Automatic movement with 54 hour power reserve. Caliber 9800 mc engine. Astrotourbillon and skeleton grande complication.. Scratch resistant sapphire crystal. Titanium crown set with a sapphire cabochon. Skeleton case back. Case diameter: 50 mm. Case thickness: 18 mm. Round case shape. 18 kt white gold deployment clasp with push button. Water resistant at 30 meters / 100 feet. Functions: hour, minute. Additional Info: astroregulator complication -oscillating weight bearing the escapement. Luxury watch style. Watch label: Swiss Made. Cartier Rotonde de Cartier Astroregulateur Titanium Men's Watch W1556211.