Netherlands East Indies. 1950. Air Mail envelope addressed to Djakarta, Indonesia bearing Netherlands 10c orange (strip of three) tied by Amsterdam Station double ring '8th May' with 'Afzender/ Onbekend' hand-stamp and boxed instructional 'Retour Afzender' with Djakarta arrival '17/5' and returned too Holland '24/5' on reverse with 'Telegrafie en Telefon Staasbedrijf Der Posterrijen' label applied in blue. Nice item of interrupted mail just after the conflict for Independence.