Here is a great vintage HO gauge Baltimore & Ohio F7A powered unit.  Marked Made in Yugoslavia, which I believe means this one is AHM/Rivarossi.  Decorated in the attractive B&O blue, gray and black paint scheme with yellow stripes and lettering.  As you can see from my short bench test video, the engine does run both forward and reverse, and the cab light comes on (most of the time).  Still, that was just a short test, so if you plan on using this on a layout or such, I would strongly advise you clean and lubricate it first -I did NOT.  Photos show the unit from all 6 sides, with a yardstick in the shots for size reference.  Priced reasonably, with only actual USPS Ground Advantage or Priority Mail shipping on the 1 1/4 pound package charged to the winner!