Algeria. (French Cameroun - Nigeria). 1942. Air Mail envelope with printed 'Par Avion via Air Afrique - Sabina' addressed to French Camerouns bearing Algeria Yvert 176, 1f50 carmine and Yvert 179, 2f blue (3) tied by Alger roller date stamp '19th Dec 42', routed via Dakar, Senegal with 'Control Postal' label tied by 'Ouvert/ Par Les/ Autorite de Controle' and circular 'A/3' with Nigeria 'P.C.90/ Opened By Examiner' label tied by boxed 'Crown/ Passed/ PP/ 28' censor cachet in violet with 'Cotonou/ Dahomey '20th Dec' and Afrique Equatoriale Francaise 'Controle Postal Militaire' label tied by oval 'Ouvert/Par/ L' Autorite Militaire; with Douala and M' Balmayo arrival '14th Jan 43' on reverse.
Air Afrique and Sabina Trans Africa route with three censor labels and four censor cachets.