Watch List notes:

Elizabeth II, proof sovereign, 2017, Trial of the Pyx Issue, Celebrating 200 Years of the Pistrucci Sovereign, head r, wearing tiara, rev. St. George and the dragon (S.SC11), with Trial of the Pyx folder, with typical contact marks to fields seen on Trial of the Pyx coins, otherwise about as struck
One of 6 examples at the Trial of the Pyx.
(350-450 GBP)