Watch List notes:

(x) Bank of England, D.H.F. Somerset, specimen £1, ND (1981), serial number AN00 000000, green on multicolour underprint, caduceus at centre, Elizabeth II at right, reverse green, Sir Isaac Newton at right, (EPM B341s), in PMG holder 66 Gem UNC EPQ, red SPECIMEN overprint, rare.

Estimate: £700 - £900