20 Pounds Bank of Ireland

Bank of Ireland's £20 notes from this period occupied an unusual position: large denomination paper in a market where most commercial transactions at that scale still preferred bills of exchange or cheques. Actual hand-to-hand circulation was minimal, and surviving examples with heavy wear are rare for that reason rather than because of scarcity at issue.

The 1915–1919 window straddles the Easter Rising of 1916 and the subsequent political turbulence, though the Bank of Ireland — headquartered in the old Parliament House on College Green — maintained uninterrupted private note-issuing rights throughout, a privilege that survived partition in 1922 and persists to the present day.