Bluish Paper Experiment
On February 16, 1909, stamps printed on an experimental bluish paper were issued. These stamps were part of an effort to prevent paper shrinkage.
Postal History
First Known Mail Delivered by Air
On January 7, 1785, mail was carried by an air vehicle for the first time.
The USPOD Philatelic Agency
On December 1, 1921, the US Post Office Department opened its Philatelic Agency in Washington, DC, to the benefit of stamp collectors.
Boyd’s City Express Post
On June 17, 1844, Boyd’s City Express Post, one of the first local posts in the US, opened in New York City.
The Flags of Our Nation Series
On June 14, 2008, the USPS issued the first set of stamps in its Flags of Our Nation Series.
Postal Savings Officials
On December 22, 1910, the US Post Office Department issued its first Postal Savings Official Mail stamp.
Holiday Celebrations Series
On October 22, 1996, the USPS issued its first stamp honoring Hanukkah, which was also the first stamp in the Holiday Celebrations Series.
First Helicopter Airmail Flight
On October 1, 1947, the first official Airmail service flown by helicopter was inaugurated in Los Angeles.
The World Series of Philately
On September 19, 1968, the American Philatelic Society (APS) introduced the World Series of Philately (WSP).