weathered The Athearn Genesis HO Scale Union Pacific GP40-2 Diesel Locomotive DCC/SND 1539 is a detailed replica of a GP40-2 locomotive in yellow and gray colors, designed for model railroads and trains enthusiasts. This pre-built, ready-to-go model features a digital control system and sound, making it a realistic addition to any transportation-themed layout. With a scale of 1:87 and a B-B wheel configuration, this plastic locomotive from the Union Pacific brand is perfect for collectors and hobbyists aged 17 years and up.