1923 Air Mail Flight St. Joseph to Omaha U.S. Governmental #123 Cover.

Postmarked St. Joseph, Mo. Aug. 31,1923.

The American Air Mail Catalogue describes U.S. Governmental Flight Covers as Flights conducted under federal authority by the Signal Corps of the U.S. Army, the Post Office Department, the Postal Service, the National Guard and Space Museum and other federal bureaus in blazing the path for subsequent commercial Air Mail Routes within the U.S. boundaries, as well as U.S. Territories and Possessions.These listings also include special or occasional air mail services flown under the auspices of or with the approval of the Post Office Department, which were not under regular Air Mail Route authorizations.

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