10 Pounds Northern Bank

The Currency Commission of Ireland was established under the Currency Act of 1927, tasked with issuing a unified consolidated banknote series to replace the competing notes of multiple Irish commercial banks. Rather than absorbing those banks' issuing rights outright, the Commission struck a pragmatic arrangement: participating banks — including Northern Bank — had their names printed alongside the Commission's authority, producing what collectors now call the "Ploughman" series after the agricultural vignette common to the type.

Northern Bank's participation was commercially significant given its predominantly Ulster-focused operations, and the 10 Pound denomination was the highest-value note most ordinary businesses would ever handle. Waterlow and Sons printed the series in London.