by Randy Shoemaker Are you passionate about stamp collecting and eager to ensure the authenticity of your prized collection? Look no...

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

PSAG is excited to share this world-class gem with our PSAG followers. Scott 120 Used with light cancel and perfectly centered jumbo...

With the holiday season in full swing, the team at PSAG wants to wish our subscribers a very happy holiday season and all the best in...

October is National Stamp Collecting Month! To celebrate, let's take a look back on the humble beginnings of stamps.

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

Our Newest Expert - Meet Doc M. Pepper I am a United States Newspaper stamp expert! I am a leader in my field! To this my wife replies...

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...

Lewis Bussey, PSAG’s new expert on R.F. Overprints. Lewis has studied, collected and maintains a large database of this type of material...

The following stamps are exceptional quality and would be an excellent addition to any US stamp collection. PSAG Cert 589619 This is a...

Robert G. Rufe, President of Brandywine Valley Stamp Club, and Director of United States Stamp Society, has published Identification...

Expertising United States Unexploded Booklets by Tom Jacks These booklets were first issued in 1900 with the 2 cent stamp Scott #279....

Guide to Expertizing U.S. Stamps for Genuineness, with Randall Shoemaker, President and Owner of PSAG

GET TO KNOW OUR NEW EXPERT—Dr. Harry Brittain, PhD, FRSC

PSAG has now added an extra component - forensic analysis for color varieties.