Magnetstromapparat, Stromzeuger
German Military during WWII
Hans Joachim Coler was actually spelt Hans Joachim Coeler as told by his sister, Ursula. The Image is a copy of an Image from her home. Hans Joachim Coeler built several devices during and after the second World War: loose translations of the name of Colers Devices reveal a lot about the intent of the machines: Magnetstromapparat = Magnet current apparatus, Magnet strom apparat = Magnetic power apparatus, Stromerzeuger = Generator, Strom erzeuger = Power Generator
An excellent resource: The Invention of Hans Coler, Relating to an Alleged New Source of Power