1937 2 airmail letters; to Addis Abeba with Sc.131, 1,50Fr/1Fr DJIBOUTI AVION 17.4.30 with rare additional "2. SERVICE AVION DJIBOUTI-ADDIS"; then letter to Vienna with Sc.115, 117, 1,75Fr and 3Fr, COTE Fse DES SOMALIS / DJIBOUTI 12.NOV.37; signs of age