Netherlands East Indies. (Trans-Pacific Mail). 1941. Air Mail envelope addressed to Switzerland bearing SG 438, 60c ultramarine tied by Batavia Centrum date stamp '29th Mar 41' with 'Door Censuur Geopend' censor tape tied by Censuur/ 6 date stamp, endorsed 'By K.L.M.' , routed via Singapore with boxed 'Passed by Censor 130/A' with circular 'G' and '28' cachet.