The little Snow Plow loco is used to remove snow from the various electric commuter lines that run Subway style cars, some of the lines ending underground, but running on the surface for most of their routes. The different colors on the mini locos matches the colors used on the various train lines cars to identify the routes much like Los Angeles has the "Blue Line" light rail "Red Line" subway etc. The 2-8-2 locomotive is the same locomotive class that has been modeled by Kato, some U.S. dealers imported the Kato locos in the late 1980's ,I have one which I thought about Americanizing. The drive train (mech) I believe is what Kato adapted for their USRA 2-8-2. Now the manufacturer of the loco you have the link to "Real Line" appears to sell a number of interesting locos and detail items. Nate Goodman (Nato). Salt Lake, Utah.