Suspect Scott #413, Used Single (2/1/15).
This is not an overly expensive stamp - $25 catalog value and is often faked. This stamp can be made by adding perforations to a #409, there is no perforated stock in which to make a #413 from. The fact that the only way to make this stamp is to add perforations to an imperforated stamp, an easy conclusion is that if the perforations can be determined to be genuine then the stamp itself is genuine.
The watermark is a single line “S” that is reversed and inverted.
The suspect is 25.5mm tall at the right and at the left. The edges are parallel with each other and the frame.
The suspects perforation overlaid on genuine guage 8 1/5 perforations – as can be seen the match is very good. The perforations show all the signs of being genuine – slightly oval in shape, rough on one side and slight pressure ridges.
The vertical cut edges are probably the result of a mis-aligned stamp affixing machine. Question: did stamp affixing machines use one or more blades to separate the stamps from the coil? The right side cut edge almost matches the left side cut edge. The slight mismatch at the top could be because of a slight twist in the image of the suspect.
Conclusion: in my opinion the perforations are genuine therefore the suspect is a genuine Used Scott #413, miscut by an improperly set up stamp affixing machine.
Reference material used:
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