The Polsten was a polish attempt to make a simplified Oerlikon cannon. A prototype had been made just before the invasion of Poland and the prototype and drawings escaped with some of the designers. In Britain they completed the weapon and went into production. It was quicker, easier and cheaper to produce than the Oerlikon and was just as good. The British Airborne used it on the special mounting used above and was transported in a Hamilcar or Horsa glider, towed behind an airborne jeep. They saw action in Normandy, Holland and the crossing of the Rhine.
