1870/1961, group of five covers with postage due usages, including two covers with single usage of 1870 5 cent, unfranked German official letter sheet 1909 with 25 Cent on 2½ cent and official glassine postal administration envelope with 1894/1910 1 cent and 2½ cent, plus Dutch New Guinea Postage Due 10 cent tied on 1961 airmail official cover, overall fine
