The Biafran pound was the currency of the breakaway Republic of Biafra between 1968 and 1970. Coinage was only issued in 1969. The republic surrendered to Nigeria in January 1970 and the currency ceased to exist.
Apart from regular circulating coins, in 1969 a pair of commemorative silver coins were also issued: a crown (equal to five shillings) and a pound.
The coin features on its obverse the bust of Chukwuemeka Odumegwu Ojukwu, who served as chief of staff during Biafra’s brief independence. A coconut palm tree graces the reverse, which is inscribed INDEPENDENCE AND LIBERTY.
According to "Stephen Album Rare Coins", a company which has sold a handful of these rare coins:
“Little is known about this seldom encountered commemorative, probably intended for two years of independence. ... No specimen has appeared at auction or for sale in recent years, to the best of our recollection.”
The cataloger for Album suggests that the piece is often attributed to an Italian firm known as Istituto Numismatico Europeo, “but there is no evidence to confirm this assumption".
Uncertain letters, perhaps N.D.R., beneath the trunk of the palm tree and a possible letter C on the base of the palm may be a mint mark and designer’s initials. Regardless, the style and arrangement of the design are totally different from any of the other issues struck for Biafra during its ephemeral existence. | 
Search for Biafra: Crown 1969 on eBay 