The Culpeper microscope construction consists of two platforms: a Lignum vite base and a brass sample stage. Typical to Culpeper the legs for each level are offset.
In this Third Form of Culpeper tripod the sample stage has a circular depression. Various sample holders fit into the depression.
Spring-clip under the sample stage fastens the fishplate.
The Bonanni spring stage fits into the central circular depression.
The Bonanni stage fastens to the sample stage using a bayonet-type mount
This Bull's Eye lens is permanently attached to the sample stage; dia=24mm, f=45mm
The central illuminator has only one mirror side. dia=30mm.