A rare Explorer Dial 1963 Rolex Submariner Ref. 5513 that was purchased in 1963 for a not so princely sum of £69 is about to earn its owner more than £100,000 over 50 years later. The 1963 Rolex Oyster Perpetual Submariner with a stainless steel bracelet watch is expected to command such a premium by virtue of the special explorer…