Currency Commission Irish Free State Type 1. 1928
Fractional prefix in serial number. Type 2. 1929 - 37
Linear prefix adopted.
Currency Commission Ireland Type 3. 1938 - 40
Title of Issuing Authority altered to CURRENCY COMMISSION IRELAND Type 4. 1940 - 42
ETO code added to design as an extra security measure.
Type 5. 1943 - 44
ETO code retained.
Issuing Authority changed to CENTRAL BANK OF IRELAND Type 6. 1945 - 53
ETO code dropped from design. Type 7. 1951 - 52
From this Type on, serial numbers extended on 10/-, £1, £5 notes. Type 8. 1954 - 55
Signature change to: (1) J. J. McElligott. (2) O. J. Redmond. Type 9. 1956 - 60
Signature change to: (1) J. J. McElligott. (2) T. K. Whitaker. Type 10. 1960
From this Type on, serial numbers extended on £10 notes. Type 11. 1961 - 68
Signature change to: (1) M. Ó Muimhneacháin. (2) T. K. Whitaker.
Designation of value of note ...POUNDS STERLING PAYABLE TO THE BEARER ON DEMAND IN LONDON dropped. Type 12. 1969 - 75
Signature change to: (1) T. K. Whitaker. (2) C. H. Murray. Type 13. 1971 - 75
Metal Security thread added to £1, £5, £10 denominations only.
Star replacement note system introduced in 1974. Type 14. 1976 - 77
Signature change to: (1) C. H. Murray. (2) M. O Murchú.
Type 15. 1976
Signatures: (1) T. K. Whitaker. (2) C. H. Murray. Type 16. 1977
Signature change to: (1) C. H. Murray. (2) M. O Murchú. Type 17. 1978 - 81
Signature change to: (1) C. H. Murray. (2) Tomás F. Ó Cofaigh. Type 18. 1982 - 87
Signature change to: (1) Tomás F. Ó Cofaigh. (2) Maurice Doyle. Type 19. 1988 - 93
Signature change to: (1) Maurice Doyle. (2) S. P. Cromien.
Type 20. 1992 - 1994 Signature: (1) Maurice Doyle. (2) S. P. Cromien. Type 21. 1995 - 1998
Signature change to: (1) Muiris S. Ó Conaill. (2) P. Mullarkey. Type 22. 1998 - 1999
Prefixing letter system altered to use twelve of the last twenty
six letters of the roman alphabet. O and Q are not used. Type 23. 2001
Signature change to: (1) Muiris S. Ó Conaill. (2) John A. Hurley.