Optics consist of a three-lens system: A: Ramsden eyepiece; B: Plano-convex field lens; C: biconvex objective lens. The assembled microscope body is 8.5cm.
Eyepiece dia=6mm, f=11mm; field lens dia=2.2cm, f=4.5cm
The Lieberkuhn screws into the support cantilever, then the microscope body screws into it from the top.
The Lieberkuhn is stored within a brass cylinder, which has protected the silvered surface from oxidation.