Back in those years there were three rim widths. You might want to specify or prioritize to match the widths of your originals. The widths were 5” (modern 3.75”), 6” (modern 4.33”), and 7” (modern 5.00”). Back then, and throughout the 1940s in the Green book, the widths were measured across rim lips. Industry wide, however, the National Wheel and Rim Association (NWRA) in the early 1940s had converted to rim width measurements across the inner base rim between rim lips. Thus the modern measurements noted. Stu