Much more information on this machine can be found here. Designed in the early 70s by Nolan Bushnell and his team at Nutting, this is arguably the first stand-up fully electronic arcade machine. It was produced in 1-player versions in yellow, red and blue, and the 2-player version was made only in green. This particular unit is fully functional and still in excellent shape. All the parts are the originals as far as I know and as the counter indicates, it has only been played about a thousand times.