Love the gum trees and the heeler, too !
I'm surrounded with gum trees ! And screeching Cockatoos, laughing Kookaburras, Wombats, Echidnas and Wallabies. Tiger snakes, the occasional Eagles and Goanna visit.
This is the tag on the radiator , the red truck. Looks like the radiator has been recored. A advert from a 1934 magazine.
I am using a GM-H issued 1940 repair manual, it seems to a reprint of a Canadian manual. It has a supplement in the back for Defence vehicles.