This hand wound Audemars Piguet Royal Oak Concept Tourbillon 26223RO.OO.D010CA.01 with its polygon shaped case measures 44 mm x 16.10 mm, it is crafted from 18 K Matte Rose Gold. With its contrasting matte white ceramic bezel with polished beveled corners, and secured by 8 brushed white gold screws. The crown and chronograph pushers are brushed and polished white ceramic. The dial is openworked and features rose gold hands, hours & minute hands partially skeletonized with luminescent coating. The Tourbillon bridges and chronograph counter are made of hand-drawn steel with black PVD coating and the crown position indicator bridges and power-reserve bridges made of sapphire-blasted nickel, hand-drawn and coated with black PVD. The tourbillon is secured by a linear bridge, matching the linear 30 minute chronograph counter, thus providing symmetry to the dial. The AP 26223RO.OO.D010CA.01 is powered by the AP 2941 Calibre, which is crafted from white ceramic, ceramics are nine times harder than steel. Functions of this watch include tourbillon, chronograph, column wheel, hour, minute and power reserve indicator. This watch is complimented by a white rubber strap with titanium AP folding clasp. It has a water resistance of 100 meters and a power reserve of up to 237 hours.