Watch List notes:

(g) George IV (1820-1830), Proof Half-Sovereign, 1821, by Pistrucci, laureate head left, rev. crowned floral-garnished shield, edge milled, 4.01g, 7h (Murdoch III, 384[a]; Douglas-Morris 147; King - [cf. 203]; W&R 244 [R3]; Schneider II, - [cf. 633]; cf. Marsh 403; cf. MCE 482; Spink 3802), brilliant, much as struck, rare.
Provenance
From the Hayleigh Collection
, ,
NGC MS64* (Certification #5879380-004)
, https://www.ngccoin.com/certlookup/5879380-004/64/
Estimate: £3,000 - £4,000