The microscope has a Bonanni spring stage (top) and conical light guide (bottom). Both attach by a press-fit.
The stage mount has spring clips for a glass phial (A) and stage accessory mount (B).
The stage has a slot for the accessory forceps and a fish plate (missing), a large recessed hole for a missing accessory, and a smaller mounting hold for the accessory pointer/forceps. The stage pivots the base attachment point (arrow).
View showing the optic axis of the microscope.