Netherlands East Indies. (India - Belgium). 1918. Envelope addressed to Belgium bearing Netherlands Indies SG 219, 20c green tied by Koeala - Simpong double ring '24th Mai 16', endorsed via Nederland', routed via India with 'Opened By Censor' tape (red on white) with circular 'Frie- Gegeben' censor in violet and 'Kaiserliches Postamt/ Aachen 1' censor labels (two) with '77' postmans chop on face.