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PSE Set Registry
Register your sets and see how your collection compares to others worldwide.
Population Report
Populations of stamps certified by PSE.
Stamp Market Quarterly
Online price guide for all important U.S. stamps.
Stamp Marketplace
View PSE stamps for sale from top PSE dealers.
PSE Grading Guide
Explanation of how and why stamps are graded.
U.S. Design Numbering System
A guide to the system
Photo Grading Guide
A photographic guide to grading U.S. stamps.
Cert Verification
Verify the grade and authenticity of PSE stamps.
PSE Guarantee
View our detailed stamp guarantee system.
Links
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About PSE
About our company and experts.
Professional Stamp Experts
5965 Harrison Dr. Suite 6
Las Vegas, NV 89120
Email:
info@gradingmatters.com
Phone: (702) 776-6522
Cert Verification
No.
01390683
01/18/2021
Professional Stamp Experts
P.O. Box 539309, Henderson, NV 89053-9309
Expert Committee
We have examined the enclosed item submitted to PSE,
and are of the opinion that:
Cat #
Issue
Denom.
Color
USA#240
1893
50c
Slate blue
GRADE: Ungraded, Mint OGnh
"it is genuine unused, o.g., never hinged, with a nibbed perf at the top."
THIS CERTIFICATE IS PRINTED ON WATERMARKED PAPER AND IS NOT VALID WITHOUT WATERMARK
Enter a Cert Number and click the Verify Certification button.
Cert Number:
