In 1993 to celebrate the Life of Sir Isaac Newton, the Royal Mint released a very Limited Issue Isaac Newton $20 Twenty Dollar Silver Proof Coin struck in solid .925 Sterling Silver on behalf of Tuvalu.
The reverse features Sir Isaac Newton while the obverse depicts Queen Elizabeth II by Raphael Maklouf. These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.
Limited Mintage of 10,000 Worldwide
Finished to Royal Mint's Proof Quality in Solid .925 Sterling Silver
