Aden. 1949. Postal stationery Air Mail envelope 3/4 brown upgraded with SG 16, 1/2 yellow-green and SG 30, 1 1/2a carmine (pair) tied by Aden Camp double ring with Air Mail label, addressed to Austria with circular 'Osterreichische Zonsursteh/ 352' censor cachet in violet. Very rare item of stationery sent commercial Air Mail.