Airmail
Opening of SIPEX
On May 21, 1966, the Sixth International Philatelic Exhibition opened in Washington, DC.
Trans-Atlantic Airmail Service
On May 20, 1939, the US Post Office inaugurated its official trans-Atlantic airmail service to Europe.
First US Airmail Flight
On May 15, 1918, America’s airmail service began when two Curtiss Jenny’s departed New York and Washington, DC.
Discovery of the Inverted Jenny
On May 14, 1918, stamp collector William Robey discovered the now sought-after Inverted Jenny, #C3a.
First US Aerogram
On April 29, 1947, the US issued its first aerogram, then called an air letter sheet.
First Contract Airmail Flight
On February 15, 1926, the first contract airmail flight was made between Michigan and Ohio.
Start of the America Series
On October 12, 1989, the USPS issued the first stamp in the America series.
First U.S. Airmail Special Delivery Stamp
On August 30, 1934, the U.S. Post Office issued its first Airmail Special Delivery stamp.