Here for sale is a beautiful Prince William and Princess Diana Gold Proof Set. In Gold Proof and 2003. Prince William 21st Birthday Gold Proof FDC in the.Box of issue with all certificates. The set comes from the Channel Island of Alderney. This is from my own personal collection. These coins are in original sealed capsules and are in untouched condition. This set was issued in limited supply of only 250 sets and this is no. A must have for all collectors to own. This item is in the category "Coins\Coins\British\Proof Sets/Coins\2000s". The seller is "clarion6" and is located in this country: GB. This item can be shipped to United Kingdom.