This United States Air Mail event cover commemorates the first flight on Route A.M. 27 from Portland, Maine, postmarked June 26, 1934. The cover features a striking purple cachet depicting the Maine state seal flanked by two figures, with the banner 'Dirigo' prominently displayed above. The circular cachet text reads 'United States Air Mail - First Flight Route A.M. 27 - Portland, Maine,' clearly marking the significance of this first air mail flight event.

The envelope bears an 8-cent U.S. Air Mail postage stamp, which is integrated into the printed design, showing a winged globe and the inscription 'U.S. Postage Air Mail 8¢.' The cancel is a clear circular date stamp from Portland, Maine, dated June 26, 1934, at 5 PM, serving as an official postmark for this historic aviation event. The typed addressee is Jos. W. Eppich of Cleveland, Ohio, adding a personal touch to this collectible philatelic piece.

This event cover is a fine example for collectors interested in U.S. aviation history, airmail first flights, and specialized event covers. Its detailed cachet artwork and clear postmark provide valuable context for this milestone in air mail service, making it a desirable addition to any philatelic or aviation memorabilia collection.