U.S., Scott #C23 used on 1938 First Flight /Special Flight air mail cover, May 19, 1938, Salem Depot, N.H., to Lawrence, Mass., sent to Franklin D. Roosevelt, President of the United States, Washington, D.C., from the Franklin D. Roosevelt Collection (authenticated by H.R. Harmer). This cover is autographed by  David E. Stevens (postmaster) and James Barny (pilot). See photos for exact condition. 

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