18 kt yellow gold case. Fixed bezel. White dial with black hands and Roman numeral hour markers. Minute markers around the outer rim. Small seconds sub-dial at the 6 o'clock position. Manual wind movement with 30 hour power reserve. Caliber 2850 engine. Scratch resistant sapphire crystal. Solid case back. Case diameter: 49 mm. Case thickness: 12 mm. Round case shape. Functions: hour, minute, second. Additional Info: five minute repeater. Luxury watch style. Audemars Piguet Manual Wind White Dial 18 kt Yellow Gold Pocket Watch 25703BA.OO.0000xx.01.