Watch List notes:

(g) Elizabeth II (1952-2022), Commemorative Britannia Gold Proof 2-Coin Set, 1987 (2), Proof 25-Pounds and 10-Pounds, third crowned portrait right, rev. Britannia standing facing left, milled edge, 8.50g; 3.42g (Spink PBG02), brilliant, as struck, in Royal Mint case of issue, with Certificate of Authenticity, no. 4053 (2).

Estimate: £500 - £600