Watch List notes:

(g) PF69 ULTRA CAMEO | Elizabeth II (1952-), '500th Anniversary of the Sovereign', Proof Sovereign, 1989, by Sindall, Queen seated in King Edward's chair, rev. Tudor Rose, edge milled, 12h (Marsh 313H; Spink SC3), brilliant uncirculated, in Royal Mint case of issue, with Certificate of Authenticity, no. 02346, in NGC holder, graded PF69 ULTRA CAMEO (Cert. #6295122-002).
Provenance
The Lansdown Collection of Guineas and Sovereigns,
Estimate: £800 - £1200