In 2009 to celebrate the 40th Anniversary of the first UK 50p Fifty Pence coin, the Royal Mint released a very special Limited Issue Britannia New Pence 50p Fifty Pence Silver Proof Coin struck in solid .925 Sterling Silver.
The reverse design is a seated figure of Britannia by Christopher Ironside and the obverse design is a portrait of Elizabeth II by Ian Rank Broadley.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.