Hello Taurus:

This shotgun was sold through the mail order company Montgomery Wards (now defunct) under their brand "Western Field" back when serial numbers were not required as they are today. Mail ordering in the U.S. ended with the Gun Control Act of 1968. I cannot speak for gun laws in Canada. You might find some information about any markings on the shotgun by accessing this website, I also found this article on-line.

I hope this helps you out. As previously mentioned there may still be parts available.

Take care,

Stargazer