The 11 Most Controversial Stamps in U.S. History

Stamps have often invited debate—usually for reasons the post office never anticipated.

12 Most Controversial Stamps in American History - 24/7 Wall St.

Hungaria Stamp Exchange

Great Artists on Stamps

Postage stamp separation - Wikipedia

George Washington 3 Cent Purple Stamp - Any info or idea of Value : r/askStampCollectors

First Class: America's Marvelous Midcentury Stamps: Craig, David Cobb, Hamsley, David: 9780764364716: : Books

On this day in history, July 1, 1847, the US Post Office issues the first stamps

Rarest Stamps: Most Valuable U.S. Stamps – Philatelicly

Jenny à l'envers - Le mot juste en anglais

USPS — Stamp Art — Presidential Series (1938) Series 2 - VeVe Digital Collectibles

5 OF THE MOST CONTROVERSIAL STAMPS EVER ISSUED — JustCollecting

Trivia - 9-11-2020 & Bonus War Between the States Trivia Game