The American Plate Number Single Society

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Welcome to the official web site of the American Plate Number Single Society. APNSS is a volunteer-run association of stamp collectors organized to promote interest in plate number singles and other marginal markings.

To join APNSS or request an application form, click here or email the Secretary at:

Click on the links to the left to navigate around the web site. These links appear on each web page.

 

Plate Number Single of the Month:

Scott 2848, plate number 1

The "Plate Number Single of the Month" for September is the 29¢ commemorative honoring labor leader George Meany, issued in 1993. As was typical of the last decade of BEP-printed single-color issues, a single small plate number 1 appears in the UL, UR, LL and LR positions -- however, this was before they started printing the plate numbers in all four corners of a single pane, so you still had to buy a full pane of 50 stamps to get each plate number position. Plate blocks can still be found at or near face value at stamp shows.

Click here or on View Examples on any APNSS web page to view examples of plate number singles over the years, as well as PNS of special issues such as airmail, parcel post and revenue stamps and proofs.

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Last updated September 5, 2026.

APNSS is Affiliate #178 of the American Philatelic Society.

 

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Scott C13, plate number 20079

 

Opinions expressed by authors are their own and do not necessarily reflect those of the APNSS, its officers or members.