SOMALI COAST - ETHIOPIA AND RETURN 1931 FLIGHT COVER, franked with 1931 Colonial Expo. set tied by Djibouti, June 19, 1941 on reg. cover to Addis Abeba, black h.s. "SERVICE AVION Djibouti-Addis", Djiboutu reg. label, on back June 30, 1931 Addis Abeba arrival d.s., then returned and franked with Ethiopia 1931 1g-8g Air Post (#C11-C14), tied by July 2, 1931 Addis Abeba d.s., Addis-Abeba-Djibouti flight label (tied) and Addis-Abeba reg. label, Djibouti, July 3, 1931 arrival d.s., vertical fold affecting two stamps in each set, fine-very fine, scarce flight cover (Image)