Watch List notes:

Elizabeth II, silver proof ten pounds, 2021, milled edge variety, from The Great Engravers Series, commemorating the Gothic crown reverse by William Wyon, ELIZABETH II D. G. REG. F. F. 10 POUNDS 2021, head r., wearing tiara, rev. the reverse of the Gothic crown, crowned cruciform shields, emblems in angles, wt. 5oz. (S.GE31), with case of issue, with certificate, FDC
Certificate number 414 of only 506 issued. With pen ink to side of outer cardboard box '414/500'

Estimate: 150 - 250 GBP