The USA Trains R22362 Great Northern F-3 A Unit is a new old stock diesel locomotive designed for model railroads and trains enthusiasts aged 17 years and up. This G-gauge unit, manufactured by USA Trains, is a detailed and accurate replica of the Great Northern F-3 A locomotive, making it a valuable addition to any railroad layout. With its high-quality construction and attention to detail, this locomotive is sure to bring joy and realism to train enthusiasts' collection.