The Nigerian currency from 1955 to date?

The currencies used in Nigeria from 1955 to date are:

Nigerian Pound (£) : 1 January 1955 – 31 December 1962

First Nigerian Naira (₦) : 1 January 1973 – 1 June 1979

Second Nigerian Naira (₦) : 1 June 1979 – 2 July 1985

Third Nigerian Naira (₦) : 3 July 1985 – 29 May 1991

Fourth Nigerian Naira (₦) : 30 May 1991 – 2 October 2005

Fifth Nigerian Naira (₦) : 2 October 2005 – present

E-Naira (₦): October 2021 – present (digital currency)