Watch List notes:

Elizabeth II, Gold Proof Sovereign 2020, 'George III 200th Anniversary', obv. Clark portrait of the Queen, rev. Pistrucci, GR privy mark to left of date in exergue to commemorate the 200th anniversary of the death of George III, limited edition no. 589 of 7995, encapsulated in Royal Mint case of issue with certificate of authenticity, FDC.
(Estimate: 500 - 600 GBP)