Watch List notes:

Elizabeth II, Proof Half Sovereign 1989, '500th Anniversary of the First Gold Sovereign 1489-1989', obv. the Queen crowned and seated in King Edward's chair with orb and sceptre, rev. ANNIVERSARY OF THE GOLD SOVEREIGN 1489-1989 around crowned shield set within Tudor rose, design by Bernard Sindall, limited edition no. 3473, encapsulated in Royal Mint case of issue with certificate of authenticity, FDC.
(Estimate: 350 - 450 GBP)