Suspect Scott #387, Unused Pair with 3mm Spacing.
This suspect was analyzed for a client of mine and if this was a genuine stamp it would be a moderately expensive stamp - $475.00 catalog value and is often faked. This stamp can be made by adding perforations to a trimmed imperforate #383, adding perforations to an imperforate horizontal coil #383H or trimming the perforations off the top and/or bottom of a perforated #374.
The watermark is single line, normal and reads horizontal.
The suspectís perforations were overlaid on an Instanta gauge.
As can be seen the perforations are spot on but have issues:
Conclusion: In my opinion the suspect is a #383 with fake perforations added. This is a well-executed fake.
the client submitted the suspect pair to the William Weiss Expertizing Service and a certificate was returned stating the suspect was indeed a #383 with fake perforations added.
Reference material used::
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