Audemars Piguet Royal Oak Perpetual Calendar Platinum/Steel Case: Octagonal stainless steel case with platinum bezel 950/1000, integrated stainless steel and platinum bracelet, Limited to 25 pieces;Dial: Black Tappisserie-dial with applied white gold indeces and white gold hands, silver-coloured subdials, month and leap year indications at 12 o'clock, date indication at 3 o'clock, moonphase indication at 6 o'clock, weekday indication at 9 o'clock, signed: "Audemars Piguet Automatic";Movement: Rhodium-plated automatic movement with Geneva stripes;Cal.: 2120/2802;Ref.: 258205P.OO.0944SP.02;Movement No.: 505999;Case No.: E-53230 / No 170;Accessories: Certificate of Authenticity;D=: 39mm;Year: 2001; Starting Bid : 50000