Great Britain
George III brockage error 18 Pence ND, S-3771 and KM-Tn2 type but undated as the reverse is missing, Laureate Bust in Armor, Mint Error AU55 "D/S - Full Brockage rev" PCGS, an extraordinary mint mistake showing a deeply struck and doubled incuse image of the obverse on the reverse, the surfaces choice for the grade, with original silvery gray toning. Rare!
Estimate: 1500-2000 USD