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1954（22.6） Ordinary airmail cover from Peking to Chungking（23.6），bearing 800 Yuan pair，the flat rate was not overweight，while its air rate was，thus treated as postage due bearing blue due 800 Yuan stamp，tied by（24.6） Chungking dater，obverse with red airmail cachet and due chop，reverse with confidential chop，clear markings，unusual P.R.C. postage due airmail cover.
