There are no marks that I see on this vintage, toy dump truck, but having collected Lupor and Marx toys for many years, the colors and style strongly suggest that it was made by Lupor Metal Products of New York. Lupor was a smaller toy company that competed with Marx in the 1940s and 50s. The truck is in very good condition. It appears to have been played with very little. It has all four original wheels that turn freely when the friction motor is activated. The motor is fairly strong. Shiny paint, and crisp graphics.
I currently have several tin toys, and other tin vehicles, and Marx and Lupor tin toys in my shop, and am happy to combine shipping. To see them all, type the word, "Tin toy" in the California Girls search box at the top of this page
If you are ordering more than 1 item from my shop, wait to pay until I send back an invoice with the combined shipping discount.