Philatelic Stamp Authentication and Grading

UNITED STATES

CANADA

CANADIAN PROVINCES

CANAL ZONE

HAWAII

ABOUT PSAG, Inc.

PSAG is a stamp authentication and grading company specializing in United States and Canada. With decades of experience, PSAG experts are drawn from the best in philately. We will be posting articles by noted authorities, streaming tutorial videos, interesting and helpful facts about our hobby, links to clubs and societies and much more. PSAG is taking Stamp Authentication and Grading to the next level.

Philatelic Stamp Authentication and Grading, Inc., was formed in early 2009 by noted U.S. Classics Expert, J. Randall Shoemaker. With his 31 years experience in professional expertizing and grading and being the Founder of PSE, his experience in this field is vast. Under his guidance, PSAG has put together a most impressive committee of Experts, technology and innovation. It is our goal to provide you with the highest level of expertise, customer service, responsiveness and value for your expertizing dollar. This website will be continually evolving into an interactive site that will display information historically unavailable to most collectors. Please return regularly and see how we can further serve you.

Meet Our Experts

Fee Schedule

2020 Resource Guide

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Randy Shoemaker on Discovery Channel's Auction Kings

Grading Singles, Pairs, Plate Blocks, Booklet Panes and Souvenir Sheets for US & BNA

EXPERTIZING

Expertizing and authentication is very important in todays stamp market with many stamps worth significant value. Collectors who spend more than $50 per stamp are considered advanced and can amass a valuable collection over time. As they add scarce and expensive items, it is important to be sure you are getting full value for your collecting dollar...

GRADING

The use of grading terms to describe the relative quality of a stamp has been going on since the very beginning of stamp collecting in the mid to late 1800’s. Beginning in 1987, a system was developed to finally begin standardizing the terminology and numerical grading of postage stamps. The system was built on the generally accepted...

PHOTO GRADING GUIDE

Our unique photo grading guide is the best way to visually learn the ins and outs of stamp grading. The following stamp images and their associated relative centering grade are to show, in visual terms, what is meant by each grade. Faults and their affect on the overall GRADE are NOT factored into the examples below...