20 Pounds Millennium of the Manx Parliament (Tynwald)

The 1979 issue commemorates Tynwald's claimed millennium — the argument being that the Norse assembly first convened on the island around 979 AD, making it one of the oldest continuously functioning parliaments in the world. That claim has always carried a degree of scholarly dispute, since the documentary evidence for continuity across the early medieval period is thin, but the political occasion was genuine: the millennium celebrations were a significant moment for Manx identity, and this note was part of the official commemorative programme.

Bradbury Wilkinson printed the series until their absorption into De La Rue in 1990. At £20 face value in 1979, most examples were likely set aside rather than spent.