Watch List notes:

BRITISH COINS, MILLED GOLD SOVEREIGNS, George III, Gold Sovereign, 1820, closed 2, neater smaller date arrangement, second laureate head right, finer engraved hair, date below, 8 and closed 2 spaced apart, ascending colon in legend, only a trace of outer linear circle, rev St George slaying dragon right with broken lance, most letter I's with missing serifs in legend (Bentley 8; Marsh 4; MCE 466; S 3785C). With a very weak rim, surface marks and hairlines, some old sellotape deposit on bust, otherwise good fine.
Calendar year mintage 931,994
Total calendar year mintage for the reign of George III = 6,518,037 pieces
George III died 29 January 1820

Estimate: £500-700