Watch List notes:

NGC PF64 CAM | George III (1760-1820), Gilt Copper Proof Farthing, 1806, Soho Mint Birmingham, early period, GEORGIUS III. D: G. REX., laureate and draped bust right, side whiskers rendered with incuse lines, incuse K on truncation for engraver Conrad Heinrich Kuchler, date below, Latin legend and beaded border surrounding, rev. inverted die axis, Britannia seated left on rock, holding olive branch and trident with shield, raised K to left on ground to left of shield, SOHO raised on rock to right, ship sailing right to left of Britannia, Latin legend and toothed border surrounding, BRITANNIA, edge grained (Peck 1387 [KH13]; cf. Spink 3782), a few tiny marks, toned, practically as struck, in NGC holder, graded PF64 CAMEO (Cert. #4928205-002).
Provenance,
Dmitry Markov Coins & Medals, The New York Sale LIII, 14 January 2021, lot 3163 - $575,
, ,
https://www.ngccoin.com/certlookup/4928205-002/64/,
Estimate: £250 - £350