The microscope sample stage is rectangular and has two holes for stage accessories. Microscope slides were placed on the integrated slide holder (arrow). Stage is 7x7.5cm
Under the stage is a screw peg that supported an aperture wheel (now missing).
The illuminating mirror is mounted to the descending portion of the support pillar. It is convex and has only one reflecting surface. The silver coating is missing. Diameter=3.8cm
The bull's eye lens is mounted to the stage on a rotating ball joint. Diameter=3.5cm, f=6.5cm