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Randy Shoemaker
Jul 26, 20222 min read
Newly recognized shade of a Scott 381 postmarked on May 12, 1912
If you think you might have a Scott 381 with this new shade of Brown Yellow, submit to PSAG and we will have it chemically analyzed for the
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Randy Shoemaker
Oct 7, 20211 min read
U.S. 24c Purple 1870 - 1875
The U.S. 24¢ Purple stamp has been a philatelic mystery for 122 years. As explained in the articles below, these stamps are particularly dif
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Randy Shoemaker
Jun 23, 20211 min read
233a – Error of Color (BLUE) Compared to a 233 Ultramarine.
Here is an example of the BLUE error of color variety for the 4c Columbian – 233a. Also attached is a 4c Colombian – 233. This is an...
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Randy Shoemaker
Mar 12, 20211 min read
March 2021 - Recently Expertized
The following stamps are exceptional quality and would be an excellent addition to any US stamp collection. PSAG Cert 589619 This is a...
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Randy Shoemaker
Nov 2, 20201 min read
The Latest in PSAG Services - Forensic Analysis for Color Varieties
PSAG has now added an extra component - forensic analysis for color varieties.
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