Catalogue numbers for bird stamps from Biafra
YearDate DescriptionSGMichelScottYvertÅEKSissueKS
1968 Overprint SOVEREIGN BIAFRA on Nigeria 1966.02-03 6,9-10,12 6,9-10,12 11,14-15,17 1-4 1968.01 1-4
1968 Overprint SOVEREIGN BIAFRA on Nigeria 1966.01-02 7,11,16 7,11,16 12,16,21 5-7 1968.02 5-7

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