Here are photos of a '56 International. It's a bit smaller size but the grill is different and it doesn't seem to have a split windshield.
https://classiccars.com/listings/vi...ickup-for-sale-in-las-cruces-new-mexico-88001
Here's a '47 International of about the right size. Split windshield (check) but the grill seems different.
https://classiccars.com/listings/vi...-sale-in-thief-river-falls-mn-minnesota-56701
International brand is quite possible though because he had an international truck when I first knew him - which was 1969. No doubt he turned them over occasionally but I never heard him complain about his work truck so he could have been brand loyal.
It looks like there is a wind blocker in front of the grill of the tank truck. It's deep winter and it was common practice to put the equivalent of a sheet of cardboard in front of the radiator to promote more rapid warm up and hotter running in very cold weather in those days. In fact getting and keeping a vehicle running at all in very cold weather was quite a feat. I remember people bringing batteries into the house overnight to warm up. And one of our neighbours put a pan of hot coals from the kitchen stove under the oil pan of his early '50s Chevrolet (car) to try to start it on a cold day.
I understand it was hard to get any vehicle in the early post war years, and while my FIL tended to be a Ford man (with an occasional Oldsmobile) for his cars later in life, getting a small truck of any brand in '46 - '48 might have been a win.