On other manufacturers 160mm microscopes from Nikon, Zeiss and Leitz. The objective does require a coverslip with thickness of 0.17mm.
Because of he large n. This objective excels in fluorescence microscopy. In brightfield mode, it will give sharp, well defined images that are fully color saturated. The optical condition is excellent with no element separations, scratches, dust, or fungus. The cosmetic condition is good with some metal blemishes consistent with use and appropriate for the age.