Watch List notes:

George IV, sovereign, 1830, struck en médaille, bare head l., rev. crowned shield of arms (S.3801; M.15B), about very fine, very rare
*ex St. James's Auctions, auction 30, 2014.
With Royal Mint Detail Report confirming the authenticity of the coin.
Rarity R4.
(2500-3000 GBP)