Hi John , the coupe utility style cabs have the little windows behind the doors. This was a factory original style of cab that was also used on many other Australian assembled automotive brands. It was a generic style of body.

Yes, the 1940 utility pic is likely to be early 1970s era. That was rare surviving vehicle. I have been interested in these little trucks, for many years, only ever seen one that is on the road. This 1939 model at a car show.
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1940 Canadian Chevrolet Series 13 (1/2-t) utility (Australian)
Lots of history here!
Read ot all in the DITY