This piece is a small scale HO Scale or 1/87 Scale model. It measures about 4 inches long from the back of the body to the front of the scoop.  From track to track it measures about 1.5 inches wide; so this is a very small model that fits on the palm of your hand.

 

The tracks can move. There is articulation on the arm and scoop. As you move each articulation the pins (pistons/cylinders) also move accordingly just like on the real thing.

THIS IS NOT A TOY. It is very small and fragile. It is made mainly for display purposes.

The model comes in a beautiful multicolored metal can. The can is a much collectors' item as the model itself. 

The can measures 6.25 inches long, 2.75 inches wide and 3.75 inches high.