The Audemars Piguet Royal Oak Concept Tourbillon Chronograph Titanium Ceramic Skeleton Dial 44mm Ref. 26587TI.OO.D067CA.01 showcases advanced engineering and contemporary design in the Royal Oak Concept line. This 44mm sandblasted titanium case is paired with a ceramic bezel, pushers, and screw-locked crown for a modern, robust look. The openworked skeleton dial features a black 30-minute chronograph counter, openworked white gold hands, and a black inner bezel with red accents. Powered by the manual-winding Calibre AP 2949, the watch delivers hours, minutes, chronograph, column wheel, and tourbillon escapement functions, with a 65-hour power reserve. The titanium caseback is fitted with glareproof sapphire for movement visibility. Water resistance is rated to 100 meters. The red rubber strap with titanium deployment clasp, plus an additional black strap, adds versatility. Notable highlights include the visible peripheral platinum rotor, sandblasted finishing, and hand-crafted movement, making this a standout in modern Haute Horlogerie.