Watch List notes:

(g) George V (1910-1936), Proof Half-Sovereign, 1911, by Mackennal and Pistrucci, bare head left, rev. St George and Dragon, 3.99g, 1h (W&R 418; Spink 4006), some friction, otherwise brilliant, much as struck, , This lot is also offered as a group lot in lot 284. Whichever reaches higher hammer price will sell and the other option will be withdrawn..
Provenance
The Gemini Collection
, ,
NGC PF64 (Certification #5879473-004)
, https://www.ngccoin.com/certlookup/5879473-004/64/
Estimate: £400 - £600