This is a Peco 0-16.5 Narrow Gauge, 2-Ton Flat Wagon from their Great Little Train collection. It was quickly assembled with a bit of solder and a solder iron. It requires a break handle and a little paint. This wagon runs on HO gauge track, the same as On30 trains.
Great Little Trains
Model# Description
OL-1 Tram Locomotive
OL-2 Fletcher Jennings Saddle Tank Locomotive
OL-3 0-4-0 Hunslet Quarry Locomotive
OR-20 4-Ton Mineral Wagon
OR-21 2-Ton Flat Wagon
OR-22 2-Ton Bolster Wagon
OR-23 1-Ton Slate Wagon
OR-24 4-Wheel Open Wagon
OR-25 4-Wheel Box Van
OR-28 Side Tip Wagon
OR-31 4-Wheel Coach/Brake, Maroon Livery
OR-32 4-Wheel Coach/Brake, Green Livery
This is, I am assuming, a partial list of this line of Peco’s offerings.