PSE Set Registry
Register your sets and see how your collection compares to others worldwide.
Populations of stamps certified by PSE.
Stamp Market Quarterly
Online price guide for all important U.S. stamps.
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.
Verify the grade and authenticity of PSE stamps.
View our detailed stamp guarantee system.
View links to dealers, organizations, and auctions.
About our company and experts.
Professional Stamp Experts
P.O. Box 539309
Henderson, NV 89053-9309
Phone : (702) 776-6522
When you see a listing of a PSE stamp for sale, you can verify the grade and authenticity of the stamp by simply entering the certification number below. With the PSE certification number, you can verify the authenticity and quality of the certified stamps you see for sale online as stamps actually evaluated by PSE experts. After you receive the stamp, it should have the same PSE certification number, grade, and description.
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