Watch List notes:

George V, sovereign, 1921M, bare head l., rev. St. George and the dragon, M on groundline (S.3999; M.239), certified and graded by PCGS as About Uncirculated 58
*ex Spink USA, March 2020.
The scarcest Melbourne mint mark date. Rarity R3.
The only example awarded About Uncirculated 58 by PCGS. In an old PCGS holder, in the current cataloguer's opinion, it seems somewhat undergraded.
(8000-10000 GBP)