The company Liesegang was founded in 1854 and until 2004 as Ed. Liesegang oHG in Dusseldorf, and was a specialist German manufacturer of projection technology .Slide projector in wooden case with slide holder attached to the inner wall of the box. The box has a sliding lid. The slider is marked with the name of the object and the manufacturer: Blenschieber 5 x 5 / Ed. Liesegang, Dusseldorf. Given that Liesegang (1854-2004) were a major manufacturer of slide projectors, it is probable that the entire projector, slider and case were made by this manufacturer.Blenschieber 5 x 5 / Ed. Liesegang, Dusseldorfslide projector, liesegang