Netherlands East Indies. 1941. Air Mail envelope addressed to Switzerland bearing SG 1c slate, SG 410, 50c indigo, SG 427, 5c blue, SG 431, 17 1/2c orange, SG 440, 1g violet, SG 464, 4c olive and SG 466, 7 1/2c violet tied by Batavia Centrum date stamp '15th Sept 41' with Diboeka Oleh Censuur' label tied by circular 'Censuur/ 6' hand-stamp endorsed 'By K.L.M. to Manila and P.A.A. to USA and Onward Air Transmission' with Singapore censor hand-stamp 'H' and '2' in violet on face. Nice routing. Superb item routed paying the 1g85 rate over two oceans.