Ran across these at a mostly abandoned coal mine and processing plant in Polly KY.
I am no expert on engines, but these are switchers made by the General Motors Electromotive Division…maybe carry the NW designation, which would mean they date from the early 40s. I was able to get the serial number, but it didn’t yield any information when I conducted a search.
These have been hit by vandals. That’s no surprise.
Blogging the Railroad Tunnels 
Reblogged this on By the Mighty Mumford and commented:
GET THE PICTURES WHILE YOU CAN…I TOOK PICS OF SOME EQUIPMENT THAT WAS GONE THE NEXT WEEK!