The mirror has one reflective, parabolic surface. Diameter=4.0cm
The bull's eye lens is mounted to a friction sleeve. Dia=3.2cm, f=7.5cm
The Lieberkuhn reflector (A) screws to the end of a sleeve (C). The silver surface is protected when the reflector is stored in the brass case (B)
Microscopes of this era conrolled light by adding a condenser cone to the stage.
The Nairne & Blunt microscope has two different condenser cones.
The microscope objective snout is marked for Liberkuhn positions. The numbers correspond to the objective used.