Watch List notes:

SINCONA BRITISH COLLECTION – PART 4. GREAT BRITAIN. GEORGE IV. 1820-1830.
Proof Half Sovereign 1821, London. Silver pattern. Laureate head, plain edge, die axis 12h (en medaille). By Benedetto Pistrucci. 2.82 g. WR 244 var. Fr. 378. Sehr selten / Very rare. Prachtexemplar / Cabinet piece. NGC PF65.
(~€ 5'000/USD 5'375)

Finest certified by NGC.