Nick,
This site gives you lots of illustrations to help you determine if you have an APT or WC52:
http://www.wheelsofvictory.com/Canad...4%20dodge.html
http://www.wheelsofvictory.com/Canad...20vervolg.html
http://www.wheelsofvictory.com/diffe...sa-canada.html
But, as Frank mentioned the APT is the one with the narrow box.
APT or WC52, I have to agree with the others that both are unlikely to have seen action in Normandy with Canadian units.
Alex