Watch List notes:

(g) PF68 ULTRA CAMEO | Elizabeth II (1952-), 'St. George and Dragon Definitive' Proof Sovereign, 2005, fourth head, by T Noad, edge milled, 8.00g, 11h (Spink SC6 [4432]), brilliant uncirculated, in Royal Mint case of issue, with Certificate of Authenticity, no. 1935, in NGC holder, graded PF68 ULTRA CAMEO (Cert. #6295122-006).
Provenance
The Lansdown Collection of Guineas and Sovereigns,
Estimate: £300 - £350