1940 Cummins HBS-600 Diesel Engine for Mack Truck NEW Sign 30 x 40 USA STEEL. Has 4 pre-drilled holes with brass grommets. Cool piece of Americana. Great coloration in the sign. This sign has a high quality baked on gloss finish. Made in AMERICA of American Steel. 24 x 30 steel. 18 x 24 steel. 15 x 20 steel. Please message for other prices. Please message me if you have interests in vintage advertisements. I have thousands of them categorized and waiting to be listed. There are more ads and 1000 categories of contemporary collectibles. At my site: AmericanIkons.