Professional Stamp Experts
PSE - Unrivalled Expertise and an Opinion You Can Trust
PSE Expert Stamp Graders

Scott Murphy, Senior Expert
Rex Bishop, Expert
Other PSE Experts
  • Larry Bustillo
  • Glen Tjia
  • Samantha D'Ambrosio
  • Richard Friedberg
  • Allen Furikawa
  • Allen Hofsetz
  • Tom Jacks
  • Eric Jackson
  • Ron Lesher
  • John Hotchner
  • Frank Mandel
  • Don Medcalf
  • Jonathan Orenstein
  • Lothar Vallot
  • Richard H. Salz
  • Don Tocher
PSE Staff
  • Scott Murphy, CEO, Senior Expert
  • Caj Brejtfus, CFO, Marketing/Advertising
  • Rex Bishop, Expert
  • William T. Crowe, Expert
  • Marina Murphy, Processing/Customer Relations
  • Tom Schilling, Expert, Set Registry Admin, CTO

Our Board of Philatelic Consultants

What do you expect from a stamp authentication service? First and foremost, expertise.

PSE's philatelic experts are chosen from among the most knowledgeable dealers and collectors in the United States for each area of philately. Each submission is examined by experts specializing in the specific area in question. In almost every area of specialty, PSE's philatelic experts are the most well-known and well-respected in their field.

The PSE Authentication Process

PSE has a well-deserved reputation in the philatelic community for honesty and integrity in all of its dealings. No other stamp authentication company holds itself to a higher ethical standard than PSE.

Our philatelic experts are forbidden from rendering an opinion on any item in which they may have an interest, whether financial or otherwise. Strictly enforced policies and procedures are in force to prevent this from happening.

Total anonymity is practiced throughout the authentication process. Once received, each item is assigned a PSE Control Number, which is an item's only identification as it makes its way through the authentication process. No information is divulged to anyone at any time regarding the ownership of a submission, whether past, present or future.

From Magnifiers to Video Imaging Technology

PSE employs an impressive array of philatelic examining equipment, from magnifiers and millimeter gauges to state-of-the-art technology. Our portable Forensic Foster & Freeman VSC-4c color-infrared-UV video imaging system enables us to detect even the most subtle forgeries, alterations, erasures, and masked defects. It can be used to display items side-by-side or overlaid on known authentic stamps for comparison.

The PSE Advantage

PSE offers many advantages to all serious collectors who need authentication and grading services for United States, U.S. Possessions, Confederate States of America, stamps, covers, postal stationery, and Back-of-Book material.

  • Prestigious Board of Philatelic Experts - More than 70 of the finest students of U.S. Philately
  • Over 2,000 Years of Cumulative Experience
  • Highest Quality Opinions with Consistency
  • Third Party Independent Grading & Encapsulation
  • Accepted by All Major Auction Firms
  • Wide Variety of Services - Turnarounds of 10 to 40 days
  • Submissions Fully-Insured While at PSE
  • Full-Color Certificates

Authentication Categories

  • 19th Century Unused & Used
  • 20th Century Unused & Used
  • Fancy Cancels
  • Booklet Panes
  • Revenues
  • All Postal History
  • Classic Plating
  • Specimens
  • Private Vending Coils
  • Errors, Freaks & Oddities
  • Envelopes / Wrappers
  • Postmaster Provisionals