Camerouns. (French Cameroun). 1952. Air Mail envelope written from the Cameroun military in Douala addressed to the United States cancelled by Ambam/ Cameroun date stamp in blue '18th Nov 42' routed via Douala '26th Nov' and the port of Ebolowa '27th Nov' on reverse and bearing French Armed Forces F.M. in carmine, but not sufficient for Air Mail with hand-struck 'T' (applied in Ambam) and boxed instructional 'Voie Maritime/ Affranchissement Insuffisant/ Pour la voie Aerienne' , taxed on arrival with 'T' hand-stamp and 'Postage Due...8 cents/ Chicago Ill. For Sec. 2' in violet on face. Ex Maddocks and illustrated in his book.Superb item.