Grading

Scott 120

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

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...

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...

The Latest in PSAG Services - Forensic Analysis for Color Varieties

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