Watch List notes:

Great Britain ND (1970-77) P-374g PMG Gem UNC 65 EPQ 1 Pound (Mismatched S/N Error)

A curious issue which occurs when one of the digits get stuck in the numbering barrel for a brief moment and the two serial numbers no longer match. Usually these are quickly found and subsequently destroyed, but this one was released and saved by a keen-eyed citizen.