100 Pounds

The £100 was the highest denomination in the Central Bank's "Lady Lavery" series, and at that value it was essentially a banker's note — rarely handled by the general public and more often used for interbank settlement than retail commerce. The Whitaker signature is worth noting: T.K. Whitaker served as Secretary of the Department of Finance before moving to the Governor's chair at the Central Bank, and his name appearing on Irish currency across two different signature pairings reflects an unusually long institutional tenure during a period of significant economic transformation in the Republic.

Early dates were printed by De La Rue; later issues came from the Central Bank's own printing works in Dublin, which became operational in the mid-1970s. The transition is not always obvious from the notes themselves.