This is a model replica of a Caterpillar 390D Excavator. The model is made from diecast metal with plastic detail parts and is produced by Toy State under the Metal Machines brand name. It is NOT HO scale and is actually 1/100 scale. Boom has limited articulation tracks are movable. Although not exact 1/87th scale it can be useful for HO scale as a background vehicle.
Models is approx. 5.5" long