That's 40's not 30's. The pictures load real slow so I'll bet not many people are actually looking at them.
Its probably a '41 or '46, though it could be anything '41 to '47. '47 was a split year with a model change mid-year. While there was very little production during the war years every once in a while someone shows up with a war production truck.
I spent two weeks in Cortez in the fall of 1980. I remember it as a very pleasant place, but I've never been back.