In 2013 to celebrate the 60th Anniversary of the Queen's Coronation, the Royal Mint released a very Limited Issue Coronation Piedfort £5 Five Pound Silver Proof Coin struck in solid .925 Sterling Silver.
The reverse designed by Emma Noble depicts the Imperial State Crown in spirit with her lifelong service to the nation and the Commonwealth.
The obverse designed by Ian Rank Broadley FRBS depicts the stunning portrait of Her Majesty Queen Elizabeth II.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.
Piedforts are coins which have been specially struck on thicker than normal blanks.
As their name suggests they are closely associated with France, where from the twelfth century they were apparently issued by the Kings as presentation pieces.
In Britain the practise of striking piedforts is later and less frequent, but medieval and Tudor examples are known.