I see all these worth a shots and raise you a Stamp Book BarCode. : r/USPS

US Postal Service New Stamp Issues and images for 2022 - STAMPBOARDS - Postage Stamp Chat Board and Stamp Forum

Postal Bulletin 22235 - June 19, 2008 - Lake County Philatelic Society

This poster at the Post Office has the stamp on the wrong side of the envelope. : r/mildlyinteresting

I got this international stamp from the self-service kiosk, does it work the same as a regular stamp when I put it on a postcard? : r/USPS

The American Philatelist April 2020

Why do some stamps have barcodes and numbers like this? : r/USPS

Are vintage postage stamps worth more if they are postmarked? - Quora

Postal Bulletin 22198 - January 18, 2007 - USPS.com® - About

Library Stamp, Read Love Return, Custom From the Library of Book Stamp, Teacher Library Stamp, Personalized Self Inking or Wooden

Postal Bulletin 22134 - August 5, 2004 - USPS.com® - About

14” x 9.5” print printing in the USA. 100# bright white cover stock paper with metallic ink for the stars. Backside has the Trickster Logo, the USPS

Raven Story Stamp Silkscreen Print

DMM 601 Mailability

Are vintage postage stamps worth more if they are postmarked? - Quora