Watch List notes:

George III, sovereign, 1820, closed 2 in date, die flaw / metal flow giving the impression of an extra laurel leaf, legend type B (ascending colon after BRITANNIAR, space between REX and F:D:), laur. head r., rev. St. George and the dragon (S.3785C; M.4B), fine
With Royal Mint Detail Report suggesting that the laurel leaf shape mark down the neck is likely due to a worn die.
A most unusual variety, scarce.
(750-1250 GBP)