Maybe not by them specifically, but by the exporter who wanted to get top dollar for them. Westrifle sold many of them, so I call them "Westrifle guns" which is probably not fair since I'm sure a whole bunch of others sold them as well. When you see stars and dates cartouches suddenly show up on guns that had zero recorded instances of them for darn near 30 years, something's fishy in Denmark.
They may never have gotten caught if they didn't do outrageous things like stamp '49's and 56's-58's.
As it is, most Canadians don't really much care it seems. It's an original unissued, un-refurbed, unfired gun to all of them and you can talk and try to call attention to thee descrepancies til you're blue in the face, but in the end you either a) just don't understand or b) you're jealous of their $200 SVT40s.