I have a Silver Proof Coin commemorating the marriage of HRH Prince Charles and Lady Diana Spencer. The Royal Mint was authorised to strike the commemorative coin. A maximum of only 250,000 Coins were issued for World Wide distribution. The reverse of the coin features the profiles of the Prince of Wales and Lady Diana Spencer, in a contemporary and informal portrayal. The design was prepared by Phillip Nathan a former Royal Mint engraver. His initials “ P.N ” can be seen just below the portrait of Prince Charles. The design on the obverse is a portrait of Her Majesty Queen Elizabeth the II wearing the Tiara which was a wedding present from her grandmother the late Queen Mary. I have had the coin for 41 yrs and it is still in the original box with the Royal Mint Emblem on the inside of the top of the box. The coin is still protected in casing it was put in, it has never been opened and is untouched. I was just enquiring as to the value of this coin and would appreciate any information anyone can give me. Regards JesseJ