To tell which country the car was built in, all you need do is check the VIN. From 1960 through 1964, plus 1965 in the U.S., the 4th digit from the left is the letter for the assembly plant that built the car. Canadian-built 1965 cars used an 11 digit VIN and the assembly plant code is the 5th digit from the left.
Codes 1 through 7 are for the assembly plants in Detroit, Newark, St.Louis and Los Angeles. Code 8 is the for Wyoming Avenue plant (used by DeSoto 1937-1958) where CKD units were prepared for shipping to various parts of the world. The CKD units were generally painted in the country they were destined. I say "generally" as the type of parts stuffed in the box varied by the company ordering the car. And the CKD units usually received a special plate mounted on either the cowl or the front inner fender with the make, model, colour and, of course, serial number.
Cars built for export in plants other than code 8 usually had the normal VIN as used in the U.S.
Code 9 was for the Windsor assembly plant.