HARRY WINSTON, OCEAN TRIPLE RETROGRADE CHRONOGRAPH Reference: 400-MCRA44W. Serial number: 025360. 18k white gold case. Blue and grey dial. Retrograde chronograph hours, minutes, seconds, power reserve indicator. Self-winding mechanical movement (calibre HW1033). Rubber strap on white gold folding clasp, signed. Sapphire crystal. Circa 2010. Diameter 44 mm. The watch comes with its case and papers. An 18K gold wristwatch automatic movement with chronograph, by Harry Winston. Circa 2010.