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.