BRITISH COINS, MILLED GOLD SOVEREIGNS, George IV, Gold Sovereign, 1821, first laureate head left, b.p. below, legend surrounding reads GEORGIUS IIII D: G: BRITANNIAR: REX F: D:, rev St George slaying dragon right with sword, date in exergue, B.P. to upper right (Bentley 4; Marsh 5; MCE 471; S 3800). Some surface marks and a myriad of hairlines in the fields and upon design, some light nicks and marks around chin and under truncation, scratch on the reverse below cape across sword forearm and scuff by head of the horse, otherwise about extremely fine.
Calendar year mintage 9,405,114
Looking at this calendar year total if we allow for Marsh's estimate of 1,170,000 of these being 1820 dated coins of George III then we must reduce this total to 8,235,114.
It is interesting to note that the first type Sovereign of King George IV are the only sovereigns ever issued with decorative style lettering with "hatched" compartments.
Estimate: £1000-1200