This is description of this part:
Eyepiece tube for 30 mm eyepieces for the binocular head of the Zeiss microscope.
This type of head is used in Zeiss Axioskop 20 microscopes (this head has the catalog number 45 29 07 - alternative notation: 452907) as well as in inverted microscopes Zeiss Axiovert 100. It is very likely that the same head was also installed in other microscope models, e.g. Zeiss Axioskop 50 and others.
The tube is universal - there is no difference between the right and left side.
What is this part needed for?
- as a service part for replacement, because this tube is very often dented and the eyepiece cannot be inserted