In 2006 to celebrate the Queens 80th Birthday, the Royal Mint released a very Limited Issue Maundy Silver Proof 4 Coin Set all struck in solid .925 Sterling Silver and includes the 4D Four Pence down to the 1D One Pence.
The reverse design of each coin depicts a crowned numeral in a wreath of oak leaves. The obverse depicts the stunning young head portrait of Elizabeth II by Mary Gillick.
Maundy Money, legally called "the Queen's Maundy Money" is a welcoming British coinage given to deserving poor people in a religious ceremony performed, in many periods with the participation of the monarch, on Maundy Thursday, the Thursday before Easter.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.