USPS Total Eclipse of the Sun - 16 First Class Forever Stamps

On August 21, 2017, tens of millions of people in the United States had an opportunity to view a total eclipse of the Sun. A total solar eclipse was last seen on the U.S. mainland in 1979, but only in the Northwest. The eclipse swept a narrow path across the entire country—the first time this has happened since 1918. The U.S. Postal Service® anticipated this rare event with a stamp celebrating the majesty of solar eclipses.The Total Eclipse of the Sun stamp is the first U.S. stamp to use thermochromic ink, which reacts to the heat of your touch. Placing your finger over the black disc on the stamp causes the ink to change from black to clear to reveal an underlying image of the moon. The image reverts back to the black disc once it cools. The back of the stamp pane shows a map of the eclipse path.

USPS Total Eclipse of the Sun - 16 First Class Forever Stamps