Olympus Microscope U-GPO Gout Testing Cassette

Item has some cosmetic wear but is in proper working condition.
The filters have been glued in.
For use with upright Olympus BX model microscopes.
The cassette attaches on top of the field diaphragm. 
An analyzer is also needed for use, typically a U-KPA with analyzer slider.

Part No. U-P801