Lot 10081 – 1918 (July 8), Calgary to Edmonton flight by Miss

1918 (July 8), Calgary to Edmonton flight by Miss Katherine Stinson, folded letter from the manager of the Calgary Industrial Exhibition (under the auspices of which the flight was made) and signed by the manager, franked by two War Tax 2c + 1c stamps, one of which is tied by boxed “Aeroplane Mail Service / – JULY 9, 1918 – / CALGARY ALBERTA” cachet/ds, with Edmonton bs (July 9) and addressee’s s/l receiver (July 10). Very few covers from this flight have survived, and not all of those have the cachet/ds, very fine (AAMC PF-7; Mü. 6, 30’000pts)