I think its a early tonka but the wheels look like a smith-miller but the bodies on the smith-miller had more detail,the private label trucks were a limited production on all brands. I still have a couple I got when I was a kid but I wish I still had the hand me down trucks from my cousins,in that bunch was a mid 50s tonka allied moving and a cattle hauler along with a smith-miller mobile gas tanker and a structo fire truck and another structo cabover truck only. I did get a couple structo firetrucks to make as one when I get the time,when I first got my computer I found ebay and bought most of the toys I got for christmas back then that I could identify. Jeff