I like that, I would have bought it also.
I think you have them laid out correctly. Me thinks it might be parts for a
diffraction or refraction microscope.
It looks to me like the octagonal rods receives the light from the mirror, transmits it to the prisms which should be inside that "holder" and then the 2 prisms redirect the 2 images up through the tube to the eye piece (ocular).
And due to the clear glass tubes the rods fit into I'll make
a wild, wild guess and say it is used for studying "gases".
Optical and electron microscopy involve the diffraction, reflection, or refraction of electromagnetic radiation (visible light) /electron beams interacting with the subject of study, and the subsequent collection of this scattered radiation in order to build up an image. This process may be carried out by wide-field irradiation of the sample (for example standard light microscopy and .... http://en.wikipedia.org/wiki/Microscopy