French Camerouns. 1936. Air Mail envelope addressed to France bearing French Cameroun Yvert 119, 50c green and rose and Yvert 143, 1f brown and green (pair) tied by N'Gambe/Cameroun double ring in violet '30th Avr', endorsed 'Par Avion-Contonou' with Edea '2 Mai' and Cotonou/Dahomey '9th Mai' transits, underpaid and bearing French postage dues Yvert 42,2f violet (2) applied and tied by Paris receiver. Very attractive item.