This 1/87-HO gauge kit is an International Hobby Corporations #3512. It is cast in tan polystyrene on three runners. There is nine-inch piece of fine brass chain as well. Although the cover depicts a water tank that looks highly detailed the model itself does not include too much in the way of cast in detail. Each part will need to be distressed a bit to make it look more like wood.
In addition to the physical distressing, once the kit is complete, it will receive some additional styrene details and a good detailed paint job to help bring out the appearance of old wood.
This is one of several International Hobby kits in my collection and although they may be still found on a shelf of some hobby store this kit is no longer available from the manufacturer.