Suspect Scott #447 Used Single (8/10/15).
This is a moderately priced stamp with a catalogue value of $150.00 for a used single. According to The Experts Book “Ordinary pairs are rarely faked, the unused value multiplier being only 1 ˝ X.” This coil can only be faked by trimming the perforations from the top and bottom of a Scott #428 because there is no imperforate single line watermarked stock from which perforations can be added.
This issue could be mistaken for a #457 single line watermarked perforated 10 rotary press issue or #497 unwatermarked perforated 10 rotary press issue. The suspect has been placed over the Flat Plate / Rotary Press gauge of Sonic Imagery’s US Specialty Multi Gauge which shows that the suspect fits well within the confines of the flat plate guide lines.
The watermark needs to be checked to make sure it is single line and not the unwatermarked #446 fully perforated issue that has been trimmed down. The suspect has a single line inverted “U” in the lower right corner; it is not possible to determine if the watermark is normal or reversed.
The suspect is 24mm tall which is significantly shorted than the ideal 25mm tall.
Since there is no single line watermarked imperforate stock to fabricate this coil from it can be safely assumed that the perforations are correct and don’t need to be checked.
The top and bottom edges are not all that straight and show a degree of unevenness. The bottom edge shows indications of possible perforation remains on the right side.
Conclusion: In my opinion the suspect is a Scott #428 with the top and bottom perforations trimmed away.
Reference material used:
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