That's "21QW", which decifers to, "21" =Janesville, Wis. assembly plant. "QW"= 1947 161"in. wheelbase, 2 ton truck. Other ways of distinguishing the model, are the smooth firewall(no "H" enforcing), larger 5 fuse, fuse box, fuel tank, on the right frame-rail, & pinstripping on the leading edge of the grille bars, which are all '47, & '48 model characteristics. Looks like you have a set of Vintage Marble Reflectors also. Those things are like "Gold", in good condition. Got any pictures of the reflectors. I've got a collection of them myself. Nice truck, & thanks for the pictures.