The stand is supported by three legs that fold for storage.
Focus is via rack & pinion that moves the sample stage.
For mounting the Lieberkuhn an internally threaded collar must be inserted (L) from the top. The objective is subsequently screwed in from below.
The sample stage has a spring mount attached to the bottom of the stage. Slides would be inserted between the main stage and the spring stage. The depressed ring visible at the top (arrow) s the recess that supports the glass insert or the aquatic slides.
Mounted Lieberkuhn