Watch List notes:

(g) Elizabeth II (1952-), Proof Half-Sovereign, 1989, '500th Anniversary of the Sovereign', Queen seated upon King Edward's Chair, rev. Shield of Our Royal Arms within a crowned rose, edge milled, 4.00g, 12h (Spink SB3), scratched in obverse field at 5 o'clock, and legend at 9 o'clock, otherwise nearly as struck.

Estimate: £400 - £600