British and Irish Banknotes

ERROR: Bank of England, Leslie K. O’Brien, £1 (2), 21 November 1955, serial number M30K 452187 together with another example for comparison purposes, serial numbers on first note far too faintly printed, the indentation from the numbering machine is clear and deep, meaning the machine was probably just running out of ink, extremely fine to about uncirculated, very unusual (2 notes)
EPM B273 £120-£160