I don't mean to belabour the point, but those "D-2"s must be Aussie versions. The windshield on a D-2 gets wider as it nears the outer edge. Those appear to have later "K" type glass. Also, D-2's don't have wing windows. McCormick-Deering built tractors well into the 'fifties, maybe they built trucks Down Under? I know you "upside down"guys build some cool machinery loosely based on American designs.
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