[First flight air mail cover addressed to William E. Boeing, Seattle, Washington, from Glenn L. Martin Company, Cleveland, Ohio, July 1, 1934]

First flight air mail cover addressed to William E. Boeing, Seattle, Washington, from the Glenn L. Martin Company, Cleveland, Ohio, July 1, 1934.

Stamped: "Via Air Mail - On first trip of through schedule involving night flying on Transcontinental Air Mail Route."