In Max's first photos (Chev front Shell and Ford [superior] front Shell) you will all notice that the Ford & Chev's use different headlight rings.
The Chev uses a single outer ring, whilst the Ford [superior] uses a double dimpled outer ring (its brass), the Ford one is common with pre war trucks, Whilst the chev one was carried over for many years...
Later Ford Cab Shells have the CANADIAN script on them. KW will have a picture I am SURE.
Or go to http:
www.oldcmp.net You will see examples there!
Ian