Watch List notes:

Fifty Pence 2017 375th Anniversary of the Birth of Sir Isaac Newton S.H39 Gold Proof FDC in the Royal Mint box of issue with certificate and booklet. The booklet described Newton's achievements and his time at the Royal Mint in his roles as Warden and later Master of the Mint, and details his involvement with the branch mints in the Great Recoinage of 1696. Certificate number 137 of only 634 issued with just 500 in this presentation format

Estimate: 500-800 GBP