Nos. 17-21 Overprinted "HELP BIAFRAN CHILDREN" 1968
1970-1970Menampilkan: Biafra - Prangko - 1968 - Nos. 17-21 Overprinted "HELP BIAFRAN CHILDREN" - 5 prangko.
Menampilkan: Biafra - Prangko - 1968 - Nos. 17-21 Overprinted "HELP BIAFRAN CHILDREN" - 5 prangko.