This one came in with a buncha other stuff, mostly broken but salvageable. It had some broken steps I'll have to fabricate, as the pieces are long gone, and missing railings, but I'll be upgrading them along with their stanchions anyway, so no biggie. And as far as I'm currently aware, Santa Fe never owned any, but she'll be getting repainted after the repairs/upgrades.
It's a Mehano-made HO scale Alco C-415 high-cab switcher. Only 26 were made in reality, so it's a kinda rare beast. Real ones could be had with three different cab heights, and this is the highest...making it even more rare in reality.
It was filthy and didn't run, but I was pleasantly surprised to find it has a geared 8-wheel drive system. A Q&D cleaning, and light servicing of the electrical pickups and brushes, and she moves again...and gives every indication of being a smooth, strong puller after a complete service.
EDIT: Just for reference, this is the same model that has been upgraded with more correct pilots, custom paint, frame-mounted Kadee couplers, almost-scale-correct railings, and numerous other details. Just about as nice looking as a brass one costing well over a thousand bucks.