Watch List notes:

British Banknotes

ERROR: Currency Commission, Royal Bank of Ireland, £1, 8 December 1931, prefix 09RA, missing serial number, Brennan and Mack signatures, a few edge splits, toned, thus fine, but this is the only known error on any Ploughman banknote and is therefore an utterly remarkable find
PMI CRB 7, Pick 44b £2,000-£2,400