This is a mint 2018 USPS stamp sheet of 20 self adhesive FOREVER stamps in honor of the 100th anniversary of the beginning of airmail servce, the first of two designs. This first stamp, the Air Force Blue, commemorates the pioneering sprit of the brave Army pilots who initiated airmail service on May 15, 1918. Rendered in blue and printed intalio, this stamp features a drawing of the type of plane typically used it he early days of airmail, a curits JN-4H bipalne. Measures 7-1/4" x 7-1/4" . Mint condition. Shipping is $3.95 within the USA. International shipping rates apply. Shipping always combined on multiple purchases. Please enjoy browsing the store for lots more STAMP COLLECTIONS often. Thanks for stopping by!