British East Africa. (Tanganyika). Circa 1940. Stamp-less Air Mail envelope addressed to Germany endorsed 'H. Boehme, German Internment Camp, P.O. Dar-Es-Salaam, T.T.' cancelled by oval 'Internment Camp/ Dar Es Salaam/Passed by Censor' on reverse with 'Postal/ Internment Camp/ Commandant/ frank' in violet on face with 'Passed by Censor' and British 'Opened by Censor/ 1005' label. Nice item with early censor rated '10' by Little.