Here's the BH2-BHS I collected today.
It has the six fold nosepiece with Dplan achromats 10,20,100, Splan40PL (phase), DplanApo UV40 (dry) and two WHK10/20 eyepieces in the BH2-TR30 trinocular eyepiece tube.
It's equipped with the BH2-PCD phase condenser with phase plates for 10, 20, 40 and 100 objectives.
The part between the frame and the trinocular eyepiece tube is (part of) a reflected light fluorescence unit. It has the cut-off UV filter in place, but I didn't examine it any further, so I dont know yet if the UV excitation filter(s) is /are present.
I know this kind of attachment can usualy be used with the 12V/100w halogen illuminator, but for optimal results an illuminator carrying a mercury "burner", emmitting large quantities of UV is used. Olympus had such a device for the BH2, carrying a bulb genre Osram HBO 50, but I suppose that will be next to impossible to find at an affortable price.
From a mechanical POV the microscope seems to be in very good condition.
Optically, there might be some problems with 2 objectives (tip: always take a phase telescope with you, when assessing a second hand microscope! With a phase telescope objectives can be examined lensgroup by lensgroup and lens by lens). The front lenses were so dirty that it was impossible to evaluate them.
I accepted the microscope "as is", so I didn't ask for a discount: I considered the risk of perhaps one or two bad objectives acceptable, given the very reasonable price the seller asked.