Hong Kong. (Netherlands East Indies). 1948. Air Mail envelope addressed to Soerabaja bearing SG 148, 20c red (block of four) tied by Hong Kong double ring with instructional hand-stamp 'Paid To Office of Exchange Only' with framed 'Ctr. Deviezen/ Soerabaja 1' censor in violet on face.
Nice item with Exchange Office and D.E.I. War of Independence censor.
The Dutch East Indies declared independence from Holland at 10am 17th August 1945. There followed four years of armed resistance and conflict until the Dutch recognized this on the 27th Dec 1949.