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. 7899, encapsulated in Royal Mint case of issue with certificate of authenticity, some very minor light contact marks to the obv. field, otherwise near FDC.
(Estimate: 350 - 450 GBP)