Six postage due covers, incl. 1935 Seattle to Vancouver flight 10c due with 4c(2), 2c tied, 1918 GB to Canada, T 4 and 2c pair, 1934 Vancouver unpaid drop letter “Refused to pay Postage Due Return to Sender” handstamp. (Image)

10 postage due covers incl. 1955 to Bahamas, airmail T12, returned; 1941 Returned DLO, 1956 UMO env., 1938 US airmail , special delivery to Canada, 10c due, 1956 10c Kayak to GB, shortpaid for air, etc. (Image)

Group of several hundred mint “red” postage dues incl. plate blocks, top imprint blocks of 20, etc, dextrine, PVA gum. For the specialist. Unsorted. (Image)