The Paauw microscope has a simple Hevelius screw focus mechanism. The jam screw (A) fixes the focus base to the main support shaft, causing the microscope support shaft (B) to move up or down as the focus screw is turned.
The sample holder is a Bonanni spring stage. It is removable, and retained in position by tabs (below).
The illuminating mirror has two reflecting surfaces: flat (dia=42mm) and concave (dia=35mm).
Two of these clips hold in the spring stage.