Disassembled screwbarrel microscope. The two flat pressure plates are labeled "1" and "2" . The phial pressure plate is labeled "3". The pad attached to this plate is probably black-stained leather.
Sample pressure plate for glass phials.
Assembled screwbarrel microscope. The mounting connector to the stand is on the left.
The objective side of the screwbarrel body is engraved "1". The threaded hole accepts objectives or the compound microscope assembly.