NIGERIA. Central Bank of Nigeria. 5 & 10 Naira, ND (1973-1978). P-16b & 17b. Choice Extremely Fine to Choice About Uncirculated.2 pieces in lot. Lot includes P-16b 5 Naira and P-17b 10 Naira. The 5 Naira displays a man with machete on reverse, and the 10 Naira displays a dam on the reverse.