This is the antique models of the 1960s. Powered Cal.k2071 based upon the finest movement called movement supplied only to Audemars Piguet and Vacheron Constantin, Jaeger-LeCoultre. For the very short production period, is a scarcity of high calibre. Instead of bearing four rubies and the rotor heavy specific gravity using the 18 K. Balance チラネジテンプ & Swan neck design is very beautiful machine. Seems to be high-quality handmade and Audemars Piguet models is characterized is sharp design of the rug manufacturer in rare form. Dial is a simple classic design bar a simple index. Antique model dial no freckles, keeps a beautiful state, but dial there wounds only one thing. Also back is screw back. Audemars Piguet Cal.K2071 with a valuable model number does not come out less great is recommended.