Keystone Aircraft Corporation was an early American airplane manufacturer.
Headquartered in Bristol, Pennsylvania, the company was formed as "Ogdensburg Aeroway Corp" in 1920 by Thomas Huff and Elliot Daland, but its name was quickly changed to "Huff-Daland Aero Corp", then to "Huff-Daland Aero Company". The company made a name for itself in agricultural aircraft, and then in the United States Army Air Corps' early bomber aircraft. In 1926, Huff left the company, and it was soon purchased by Hayden, Stone & Co., who increased capital to $1 million (United States) and renamed it Keystone. In 1929, it was taken over by Curtiss-Wright. Keystone itself became a manufacturing division of Curtiss-Wright and ceased production in 1932. Wikipedia
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Taken on strength 27 June 1927. Operated for Agricultural Department on crop spraying and insecticide spraying experiments. Sprayed wheat fields near Morden, Manitoba. Operated on wheels. Used for forestry patrols from RCAF Station High River, Alberta.Known Squadron Assignments:
Taken on strength 13 June 1927. Operated for Agricultural Department on crop spraying and insecticide spraying experiments. Operated on floats. Flew demonstration air mail routes between St. Johns, NB and Montreal, Quebec in December 1927. Forced landed in Pleasant Bay, Cape Breton Island 14 September 1928, after engine problems. Claimed as salvage by local fisherman, sold back to RCAF for $25. Sprayed for mosquitos near Winnipeg in 1931.