Several examples of first prefix number 000001 notes are known among the Ploughman notes.
The latest example to be recorded is Provincial Bank of Ireland £10 note PT01 000001, pictured below.
It is likely that all of the first prefix number 000001 £1, £5, £10 notes of each bank were retained in 1929. In time, others may also turn up.
Provincial Bank of Ireland Ploughman Ten Pounds 1929