20 Pounds Bank of Ireland

The Bank of Ireland's post-decimalization series of the 1980s was printed by De La Rue in London throughout its run — an arrangement that had continued uninterrupted since the state's early banking years and that attracted periodic political criticism given Ireland's complicated relationship with British commercial institutions. The £20 denomination in this series circulated heavily during a decade of severe economic stress: unemployment peaked above 17% in the mid-1980s, emigration surged, and notes of this value passed through a lot of hands quickly.

P#67A carries the dual signatures of O'Neill and Harrison, the specific pairing that helps narrow dating within the decade-long issue window.