The case is hinged at one side to allow the top to act as the base for the microscope. A: Dovetail mount for the microscope body. B: mount probably for a bull's eye lens. C: Circular mount for the mirror.
Body dovetail mount fits into "A" left.
The microscope can be stored disassembled into the case.
Two tapered brass legs support the microscope top when the microscope is being used.
Dovetail mounting assembly.