Watch List notes:

(g) Elizabeth II (1952-2022), Royal Mint Commemorative Gold Proof 2-Coin 'Britannia and Half-Sovereign' 'Combi' Set, 1998 (2), including: Quarter-Ounce Proof 25-Pounds 'Britannia', fourth crowned portrait right, rev. Britannia standing facing left, edge milled, 8.52g, 12h (Spink BGD3, only 560 issued individually of 1,000 authorised), brilliant, as struck, with Certificate of Authenticity, no. 0230; additionally, Proof Half-Sovereign, 1998, as last, rev. St George and Dragon, edge milled, 4.01g, 12h (Spink SB4, only 6,147 issued individually of 7,500 authorised), brilliant, as struck, with Certificate of Authenticity, No. 5470; a most unusual 'Combi' Proof Set (2).

Estimate: £550 - £650