Duotron

The 4-player version of this game is Gottlieb's 1974 'Magnotron'. Pictured in this listing is an exported Sample game with serial number 01012 S. It does not have inserts at the top three rollover lanes or at the flipper inlanes to represent A-B-C, instead using painted red letters. The copyright notice is below the left flipper and not in the blue area above the bonus ladder, and the outlane B and C inserts have nearby text entirely on a blue background instead of half blue and half red.