GREAT BRITAIN: (1952-present day) Queen Elizabeth II 2006 5-coin (1/4oz) Silhouette Series Proof Gold Britannia Set. The Silhouette Series is a rare and sought after set, unusually all are dated 2006. The five designs are the Horse Drawn Chariot, Britannia Standing, Britannia Seated, Britannia facing left wearing a war helmet and Britannia along side a lion (similar to the Una & the lion). Very rarely do these sets come up for sale as only 250 were minted.