1942 Eisfeld diesel engine designed by A. Thusius and Gustav Eisfeld in Gera Germany. Gustav Eisfeld manufactured ignition and diesel engines in the late 30's. The diesel's were manufactured in the following sizes 0.5, 1.0, 2.5, 5.0, 6.0, 7.5 and 10.0cc. All of his engines were great runners and well designed.

Eisfeld 2.5cc