Manual: https://www.zeiss.com/content/dam/rms/countries/united-states/downloads/end-of-service/upright/upright-axioskop-20.pdf/_jcr_content/renditions/original./upright-axioskop-20.pdf
Microscope model Zeiss Axioskop 20 - main photo
Microscope Index: 308
Microscope model Zeiss Axioskop 20
(Microscope model: Axioskop 20)