Here's a little something you don't see all the time. Marx 3/16" scale O-gauge tin trains. Made to the same scale as American Flyer S scale, but it runs on regular three rail O-gauge track. The locomotive is a die-cast 999 but everything else is stamped sheetmetal. I've developed quite a liking to these tin trains. Almost tempted to redo my layout into an all tin world of 3/16" scale on O-gauge three rail track. But I also like smoking steamers and the 999 don't smoke.