Riverside Stamps

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Suspect Scott #347

This is a moderately valued stamp - $37.50 catalog value and is is not highlighted in the Experts Book as a candidate for being faked though was flagged at the no longer active www.1847USA.com did caution that the #347 may be faked by trimming the perforations off of a #335.

The defining feature of a Scott #347 is that it is a double line watermarked stamp. Dipping the suspect stamp in watermark fluid or viewing in my Safe Signoscope watermark detector shows what may be a single line "U" watermark - see the images below.

Safe Signoscope view - barely visible single line "U" in bottom right corner.

Suspect in watermark detection fluid.

Watermark fluid view enhanced with decreased brightness and increased contrast.

In conclusion: because the watermark is single line the suspect has to be either a Scott #378 or a Scott #428 with perforations trimmed off on four sides.

Reference material used: 

  • The Expert's Book. A practical guide to the authentication of United States stamps. By Paul W. Schmid.
  • How to Detect Damaged, Altered and Repaired Stamps. By Paul 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

I am a member of the American Philatelic Society

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APS #: 205494
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Member of the USSS
USSS #: 16733
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Website at www.usstamps.org

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Member of the IPDA
IPDA #: 231
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