Netherlands Indies. (Japanese Occupation in Java). 1942. Envelope Mail envelope addressed to Soerabaja bearing Japanese Occupation in Java SG 4, 10s blue tied by Blitar date stamp '28th Aug 43' hand-stamped 'Kao Yoo (Official Mail) and framed 'Djabatan' in red with boxed 'Ken'etsuzumi' (censored) and oval censor cachet in carmine with framed instructional. Lovely item.