In 1984 the Royal Mint issued the last coins and the last Proof Sets with the Machin bust of Queen Elizabeth II. In this Proof Set, there is a total of 5 (Five) coins not issued for circulation!!! This 1984 Proof Set contains the £1, 50p, 20p, 10p, 5p, 2p, 1p & 1/2p. Of these the 1/2p, 2p, 5p, 10p, 50p coins were not issued for circulation. If these were American coins, they would sell for at least £100 each or £700-£1,000 for the group and that doesn’t include the Proof coins that were issued for circulation. We think this last Proof Set of the Machin bust is very exciting. Remember 5 coins in this Proof Set were not issued for circulation.