The Hornby Model Railway Zero 1 Master Controller is a vintage analogue speed controller designed for model railways. Manufactured in 1980, this pre-built controller features a sleek black plastic design and offers 72 watts of power at 18 volts. Ideal for collectors and enthusiasts, this controller is perfect for controlling the speed of your train layout with the classic Hornby brand and a gauge of OO. With its AC power type, this controller is a must-have for any model railway enthusiast looking to enhance their collection with a high-quality control unit.