This coin is a continuation of the series of British West Africa sixpence coins. Unlike the small denomination bronze coins though, it has a new design.
It was only issued in 1959 and was demonetised in 1973 with the introduction of Nigeria's decimal currency, the Naira.
Crowned bust of Queen ELIZABETH II facing right; around, QUEEN ELIZABETH THE SECOND; the artist's initials CT (for Cecil Thomas) incuse on the bust truncation.
||QUEEN ELIZABETH THE SECOND
Cocoa beans; the date 1959 is below; around above, FEDERATION OF NIGERIA; around below, the denomination SIXPENCE. The legend and the denomination are separated by two small "Stars of David".
The designer's initials, HP ([Thomas] Humphrey Paget) are under the date.
||FEDERATION OF NIGERIA SIXPENCE 1959
References to additional information:
[Book] Remick, Jerome. 1971. The Guide Book and Catalogue of British Commonwealth Coins, pp 469-470.