[Letter and first flight air mail cover addressed to William E. Boeing from representative of Canadian Official Great War Exhibit, Vancouver, B.C., February 28, 1919]

Letter and first flight air mail cover addressed to William E. Boeing from a representative of the Canadian Official Great War Exhibit, Vancouver, B.C., February 28, 1919. Certifies Boeing arrived in Vancouver, B.C. by seaplane, making the first international flight between Vancouver, B.C. and Seattle. One typed page and envelope.

Stamped on envelope: "Via Airplane Mail, First Flight, Vancouver, B.C. to Seattle."