What's a Canadian release Slag? is it the same as the US/AUS ones we got? Other than the original G1 version of slag the only other official release was the G2 version that came in silver/green/red IIRC (this version has the takara stamping removed and china is added to the hasbro stamping). Also the word slag with a auto symbol is printed somewhere on him (on the black body parts I think).
Not sure if the KO has the stamps, but here is a guide I found:
http://www.ebay.com/gds/Slag-Review-...6760342/g.html