Canada #717-719, 718i 15c-25c Multicoloured Trembling Aspen - Sugar Maple, 1977-1982 Floral & Environment Issue, 2 VF Canada Post Official FDC's Franked With A Combination Of 3 Singles, On DF & LF Papers, LF Envelopes

2 VF Canada Post official FDC's of the 15c-25c multicoloured Trembling Aspen - Sugar Maple from the 1977-1982 Floral & Environment Issue franked with a combination of 3 singles, on DF & LF papers, LF envelopes. One envelope has the 15c and 25c on DF paper, while the 20c is LF. The other has all three stamps on DF paper. The DF and LF envelopes appear to be the standard ones for these issues, with the those higher than LF being less common. The fluorescence of the envelopes is an important characteristic that has been ignored by all the catalogues. Why does it matter? Because the envelope is an integral component of the FDC in the same way that a cover would be to a complete booklet, or the cardboard insert would be to a pack of plate blocks. The expectation, and general observation would be that Canada Post would utilize one type of envelope for a particular issue, so that if a different one from the standard type is found, then there is a good chance that it will be scarce, and is therefore, in our opinion collectible.

Chung values these at 5.60 for the basic covers, and Unitrade values the 20c on NF (DF) paper at $4 for mint. Our estimate of the value of these covers is $10.