Canada #1155, 1251, 1256 1c Flying Squirrel, 38c World Trade & 38c Christmas, Combination Usage on 1990 Cover to Denmark

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A very fine cover to Denmark, sent on March 17, 1990 after the rate change to 78c. Franked with the 38c 1989 Christmas stamp, the 38c 1989 World Trade Issue and two make up 1c Flying Squirel stamps (Slater paper) to make up the 78c rate to Denmark. 

      Unitrade generally values single usages of international stamps on cover at $15 each. This is a combination usage of commemoratives, within period, so it is at least as good as a single use of a high value definitive.