Canada #648viivar 8c Multicoloured Mercury and Horse, 1974 UPU Centenary Issue, A VFNH Pair of the Smooth DF Paper and Unlisted "Flaming 8" Variety
A fine centered and fresh NH pair of the 8c Mercury and winged horse stamp from the 1974 UPU Centenary issue, printed on the scarce smooth dull fluorescent paper, showing the "flaming 8" variety on the right stamp, which arises from an ink drag involving the red inscription ink.
Unitrade values this pair at $5, for the basic paper variety, but with the additional variety I am estimating it at $10. The pair offered here grades 70 as follows:
Paper freshness: 5/5
Absence of visible paper flaws: 5/5