Watch List notes:

(g) George IV (1820-1830), Half-Sovereign, 1821, laureate head left, rev. crowned floral-garnished shield, edge milled, 3.85g, 6h (Murdoch III, 353[c]; Douglas-Morris 148; King 203; Marsh 403 [R5]; MCE 482; Spink 3802), from a clasp mount with minor resultant damage and surface cleaning, otherwise central devices struck up, a bold very fine, a rare one year type.
Provenance
The Roy Francis Collection
, ,
NGC AU-Details ~ Removed from Jewellery (Certification #5879380-014)
, https://www.ngccoin.com/certlookup/5879380-014/NGCDetails/
Estimate: £500 - £800