Nice vintage usable piece. If it was mine ,I'd take the time to sharpen them . get yourself a c-clamp and clamp the wheel cutter down to the edge of a bench top and lightly run a fine 1/2 round bastard file into the beveled side of the edge .If you happen to curl a burr over on the flat side ,take the flat side of the file to it but only laid flat to the entire surface and go slow. Test the edge with the back of a thumbnail ,if it shaves a little nail , its good. If you know any profession TIG welders polish up the edge with a fresh length of tungsten rod in the same angle as the file. Doesn't look like it does much but it makes a dangerously sharp edge. If you weren't in another country I'd offer to sharpen them for you in exchange for some leaf.