Riverside Stamps

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Suspect Scott #348, Used Single.

This is a moderately priced stamp with a catalogue value of $37.50. This coil is often faked and can be manufactured from the following stock: adding fake perforations to a trimmed imperforate #343, adding fake perforations to the imperforate vertical coil #343V, trimming the perforations off the left and/or right of a perforated #331 and trimming the perforations from the left or right of the #331a booklet stamps.

The watermark is double line P in the upper left corner that is inverted, reversed and reads horizontal which eliminate the possibility of the suspect being a booklet single which would have a watermark that reads vertical.

The left edge is a natural straight edge showing the guide line. The Philatelic Foundation has certified a number of stamps as genuine showing a guide line on either the left or right edge. The right edge on the other hand shows obvious perforation remains at the top.

Conclusion: In my opinion the suspect is a #331 perforations trimmed from the right hand side.

Reference material used:

  • The Expert's Book. A practical guide to the authentication of United States stamps. By Paul W. Schmid.

As always comments and suggestions are always welcome.

To Contact Riverside

To Contact Riverside Stamps:
Mike Girard - Owner / Operator / Web Master: g1rardmn1099@comcast.net

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IPDA #: 231
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