Watch List notes:

(g) The St. Albans Collection of English Gold Coins | NGC MS63* | GEM EYE APPEAL | George IV (1820-1830), Sovereign, 1821, Type 1, laureate head left, rev. St George and Dragon, edge milled, 8.01g, 7h (Marsh 5; MCE 471; Bentley 13; Stratos 119-120; Spink 3800), a scuff on neck and wisps of handling in otherwise brilliant obverse fields, the obverse evidently struck with a repurposed Proof die, the reverse lustrous, a pleasingly bold extremely fine, the reverse much as struck, with NGC 'St Albans' Certification, graded MS63 STAR (#6295553-044).
Provenance
'A Distinguished Collection', purchased en bloc via Spink, August 2018,
R Richardson, Summer FPL, 2011, no. 66 - "Proof Sovereign, 1821 - a few surface marks, but the obv. field brilliant, extremely fine" - £4,000 [acquired October 2011]
Estimate: £4000 - £5000