Watch List notes:

(g) PF69 ULTRA CAMEO | The Great Engravers (No. 2) | Elizabeth II (1952-), Proof 200 Pounds, 2020, 'Three Graces', On the Union of England, Ireland and Scotland, by Jody Clark and William Wyon, in gold, Struck on the Bicentennial of George III's Death, edge milled, .999 Fine, 62.42g, 40.00mm., 12h, a beautiful homage to Wyon's unadopted Pattern for the Crown, struck in high relief in reflective fields, the central devices sharply defined and handsomely frosted, brilliant uncirculated, intensely desirable and the obvious collector coin of tomorrow, this number 21 offered in 2021, , in NGC holder, graded probably unduly PF69 ULTRA CAMEO (Cert. 6135242-001), with Royal Mint case of issue, and Certificate of Authenticity, no. 21 [of 325].
https://www.ngccoin.com/certlookup/6135242-001/69/
Estimate: £15000 - £20000