In 2016, to celebrate the 90th Birthday of Her Majesty Queen Elizabeth II, the Royal Mint released a Limited Issue Queens 90th Birthday Piedfort £5 Five Pound Silver Proof Coin struck in solid .925 Sterling Silver Certified Slabbed and Graded by PCGS as PR70 DCAM.

The reverse designed by Christopher Hobbs depicts a circle of roses and 'E II R 90' in the center while t he obverse design features the Fifth Portrait of Queen Elizabeth II designed by Jody Clark.
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.

Royal Mint Product Code - UK1690PF

• Limited Mintage of 3,099 Coins Worldwide
• Piedfort Double the Thickness and Weight of its Standard Counterpart
• Struck to Royal Mint's Proof Quality in Solid .925 Sterling Silver
• Celebrating the 90th Birthday of Her Majesty Queen Elizabeth II
• Reverse Designed by Christopher Hobbs
• Certified Slabbed and Graded by PCGS as PR70 DCAM