The Heljan 37401 Heritage Green with Small Yellow Ends is a ready-to-go DC-powered diesel locomotive in O gauge. This model, manufactured in the 2020s, features the British Railways (1957-1966) era livery with the iconic British Rail green colour and small yellow ends. It is designed to run on a two-rail system with analogue control, perfect for collectors and enthusiasts looking to add a piece of British railway history to their collection.