This historic engine was among the first commercial model diesels to be produced anywhere in the world, being preceded only by the Swiss ETHA and Dyno models. This pioneering model diesel was designed and manufactured in very modest numbers by Anton Půrok and Gustav Bušek in occupied Czechoslovakia (now the Czech Republic) during WW2. Manufacture was confined to the years 1941 and 1942, taking place under the very noses of an extremely hostile German occupying power. Production ceased as a result of the bloody aftemath of the May 1942 assassination of Reinhard Heydrich, the Deputy Reich Protector of Bohemia and Moravia, by Czech partisans. The illustrated unit is one of a very few present-day surviving examples of this historic design. It has been bench-run, starting and performing very well. For more details of this fascinating and inspiring story, see our earlier article on the "Model Engine News" (MEN) web-site.