Elizabeth II, £5 (Prince Charles 50th Anniversary) 1998 Silver Proof

In 1998 then Prince Charles and now King Charles III celebrated his 50th birthday. The Royal Mint issued a special £5 piece to commemorate the event. You had his mother Queen Elizabeth II on one side and Prince Charles on the other side. This is a very low mintage and very important commemorative coin. They only made 13,379 in Proof Sterling Silver.