10 Pounds

The Currency Commission was established by the Currency Act of 1927, which also pegged the new Irish pound one-for-one with sterling — a parity it would maintain until 1979. This note entered circulation under that arrangement, meaning it functioned in practice as an interchangeable equivalent to the Bank of England pound, a political compromise that suited the Free State government's cautious economic thinking in the post-independence years.

Brennan was the Currency Commission's first chairman; McElligott was Secretary of the Department of Finance. Both signatures appearing together dates this to a narrow window before institutional reorganisation shifted signing responsibilities.