The "PK" in the ID plate number, makes that a 1946 2nd series, 1 1/2 ton, with a 160in., wheelbase. It could have been Titled from that number, or the engine serial number ? I've seen it done both ways. I even owned a 1951 Chevrolet COE, that had both the ID plate number, and the engine serial number on the Title. Regardless, of all this, it's technically a 1946 model, (even though it may have been built in early 47) so says the Chevrolet Master Parts Catalog, no matter what the title says, had you been ordering parts for it at the Dealership back then, it would have had to have been referred to as a 46, for correct parts.