The perforations have no chance of being genuine. Perforations on the left are closer to the design at the bottom than the top. Ditto for the perforations on the right, making the pair a trapezoid. Also, the top and bottom margins look skimpy.
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Intermediate spacings sell for approximately the same as the cheaper of the two listed spacings.
The note in the 2019 Scott US Specialized Catalog confirms that intermediate spacings exist due to uneven paper shrinkage.