12V 35W halogen lamp in special mount for the following Zeiss microscope:

AxioVert 40 (transmitted light)

*Note - it was possible to mount the transmitted light arm of the AxioVert 40 onto the AxioVert 200 or AxioObserver microscope.  In the cases when you have either of these models using the AxioVert 40 arm instead of the traditional arm with HAL 100 lamp these microscopes would take this bulb.  

Invertoskop 40