Nice pair of first flight covers for the first service on Air Mail Route 4 from Chicago, Illinois to Toronto, Ontario, Canada.

Postmarked: 1) HC - CHICAGO, ILL.. - May 24, 1967
2) HC - CHICAGO, ILL. AMF O'HARE - May 24, 1967

Cachet: Rubber-stamped design in green or red featuring the flags of the United States and Canada. Text reads: "FIRST FLIGHT AM 4 / CHICAGO TO TORONTO". The back of the Airport Mail Facility cover also has a small blue rubber stamp featuring an American Airlines logo and the words: "TORONTO / MAY 24, 1967".

Condition: Generally clean and neatly label addressed, but the AMF cover has a 1½" cut just inside the lower left edge. (Please see scans.)

MULTIPLE ITEM SHIPPING DISCOUNT: I will ship up to 4 covers for the single base shipping charge shown. (This lot includes 2 covers.) For purchases of more than 4 covers, the shipping charge will increase by just a small increment for every 4 additional covers.