5 Pounds

The Isle of Man Government began issuing its own banknotes in 1961, separate from the notes of the major British clearing banks that had previously dominated the island's circulation. By the 1990–1991 period, De La Rue's involvement was long-established and the island's fiduciary issue operated under the Treasury of the Isle of Man, a Crown dependency with its own legislative authority — not a devolved UK region.

The dual signatures of Dawson and Cashen reflect the Treasurer and a countersigning official, a practice the island maintained for accountability in a small-volume issue where physical oversight remained practical.