this is a vintage metal tin toy, Marx logo on it, engine is 9" long, 3 1/4" high, 2" side, wheels are 1 1/4" wide made in USA i have no way to test it, so it is sold as is. very cool rare piece. . Please ask me any questions you have! i am eagerly waiting to answer them! free shipping! check out my other cool vintage toys, repurposed items, spin painted items on Etsy. I also own Spin Magic - Spin Painting, check out our site www.spinmagic.net you can order custom made t-shirts drawstring bags, etc.