The Stinson HW-75 aircraft were transferred to the RCAF in 1940. They came over the border with both American and Canadian registration. This was done to circumvent the US Neutrality Act in place at that time. The aircraft were then assigned RCAF serial numbers and reverted to the original Canadian registration at wars end. These aircraft are very rare and as far as we know there is only one example of an original HW-75 extant in Canada. There are a few flying in the US but they are usually model 10's or 10-A's with 85 hp Continental or Franklin engines. This information is out there on Google.