The Hornby O Gauge Railway No50 Clockwork Black Locomotive 60199 and 2 trucks is a vintage model replica of a British Rail locomotive from Era 3 - The Big Four (1923-1947). Made of tin with a 0-4-0 wheel configuration, this pre-built locomotive features a clockwork control system and is part of the Two-Rail System. With its classic black colour and British origin, this collectable piece is a must-have for any model railway enthusiast looking to add a touch of nostalgia to their collection. Missing Key .