Rolex: A rare early 1950's pink gold calendar chronograph Oyster anti-magnetic wristwatch, the white dial with outer date ring and central date hand, raised pyramid five-minute marks, gold hands, subsidiary dials for running seconds, elapsed minutes and hours, apertures for day and month, sweep centre seconds operated by two round buttons in the band, the case with screw down winder and screwed back with makers mark No.6036, the signed movement jewelled to the centre with monometallic balance, stamped beneath the balance 72G and with an R in a shield