Watch List notes:

(g) NGC PF66 CAMEO | George VI (1936-1952), Coronation Proof Sovereign, 1937, bare head left, rev. St George and Dragon, edge plain, 7.98g, 12h (Stratos = Gemini 276; W&R 439; Spink 4076), some fingermarks, otherwise brilliant, virtually as struck and ever sought after, in NGC holder, remarkably graded PF66 CAMEO (Cert. 6295111-009)

Provenance
The Lansdown Collection of Guineas and Sovereigns