Watch List notes:

(g) NGC PF66 CAMEO | George V (1910-1936), Coronation Proof Sovereign, 1911, by B Mackennal and B Pistrucci, bare head left, rev. St. George and Dragon, edge milled, 8.00g, 12h (Stratos 148; W&R 416; Marsh 213A; Spink 3996), an arresting example, even for this commonly encountered and enduringly popular proof, brilliant uncirculated or very near so, in NGC holder, superlatively graded PF66 CAMEO (Cert. 6295111-008)

Provenance
The Lansdown Collection of Guineas and Sovereigns