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http://www.watchestrade.net/Patek-Philippe-Calatrava-18kt-Yellow-Gold-Mens-Watch-3520D.html
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<br />18kt yellow gold case. Black leather strap. Hobnail
patterned bezel. White lacquered dial. Ultra-thin mechanical manually
wound movement. Water resistant at 25 meters (80 feet). Patek Philippe
Calatrava 18kt Yellow Gold Mens Watch 3520D