for "50's Marklin Vintage Steam Locomotive, TT 800, GRO".  Heavy diecast metal locomotive, super quality.  I tested in on my test track and it ran, reversed and the lights worked.  Probably should be serviced.  This is version 3, I think with traction tires (one clear traction tire is there and one is missing) and a hand reverse lever inside the opening smoke box.  It's in really nice condition, and I don't think it's been run much.  There are a few places where the paint has rubbed off the high spots.  Ho gauge.  for 3-rail AC.  Willnot run on your American DC two-rail layout.