Vintage Delong 30 model aircraft engine. From my research I believe this to be the Die cast version manufactured around 1946 but I cannot rule out the possibility that it is a sandcast version from 1945. This engine is part of a large collection that belonged to my late father. As I am not an enthusiast myself I am unable to test or clean the engine, however externally it appears in decent condition for age. It is therefore sold as seen.