I work at Pratt and Whitney Canada and am looking for covers from the past.
The company had a few name changes over the years and used the following names; Canadian Pratt & Whitney Aircraft Company United Aircraft of Canada Pratt and Whitney Canada
Here is some information from wikipedia
The Canadian Pratt & Whitney Aircraft Company, Ltd. was founded in November 1928 to act as a service centre for P&W aircraft engines.[3] During World War II, it assembled Pratt & Whitney Wasp series engines built in the U.S. In 1952, the production of Wasp engines was transferred to P&WC so P&W could concentrate on developing jet engines. In the late 1950s, a team of 12 P&WC engineers began the development of the first small turbine engine in Canada, the PT6. The first example was delivered to a customer in 1963. In 1962, the company was renamed United Aircraft of Canada, and assumed its current name in 1975
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