I think the PW=1946 160" wheel base, E=production month of May, and the 1181 is the production number minus 1001, so the 180th truck off the line. Im not sure what the 21 means?

Jeff


My 1953 Chevrolet
1947.1 Gallery
1972 C-10 1/2 Ton & 1972 C-30 1 Ton