Watch List notes:

(g) George VI (1936-1952), Proof Half-Sovereign, 1937, edge plain, 12h (Spink 4077; W&R 442; Schneider II, 673; Stratos 70), brilliant uncirculated with frosting in recesses, in NGC holder, graded PF66 STAR (Cert. #6027416-001) [Tied 1 of 5 / 2 Finer].

Estimate: £1,600 - £2,000