@Michael Roth posted:
I group the cast iron locos in with tinplate - they typically came with tinplate cars and ran on tinplate rails. But, I digress...
My best guess is that your loco is a Hafner "Century of Progress" type engine - they are actually stamped tin bodies instead of cast iron. I zoomed in on your picture and this seems to be the closest loco I can find to it. Here is a picture of one of mine from about the same angle as your picture. This one has a red smokebox door, but they also came in an all black version.