Gaines Gravy Train Custom EMD F9 Diesel HO Train Set. This vintage train set is perfect for collectors and train enthusiasts.  The train is powered by a DC power type and the control system is analog. The material is sturdy plastic and the scale is HO. The train set has a light function and is multicolor. The train is modeled after the Gaines Gravy Train making it a unique and interesting collectible. An ideal gift for children aged 8-11 years.