CARL ZEISS III RS PHOTOMICROSCOPE microscope w/ 4 objectives and power supply

Description

Nice microscope from a professional lab.
I'm not a microscope expert, so will describe as best I can here.  Please ask questions.  If you have any information about this, please get in touch.
Power supply hooks up and buttons light up and meters move.
I plugged light into the two prong sockets and didn't light, but I think it's actually controlled somewhere else on the scope.  Bulb looks OK.
Has 4 Neofluar objectives 10, 25, 40, 100
Here's some information from a helpful ebayer....
Hi, u have an amazing scope! This is a Carl zeiss, photomicroscope iii, with a phase condenser, and phase contrast condenser, phase contrast objectives, with a camera port for an external camera. This microscope is from the 1980s. It was the first model of microscopes to have an automatic built in camera (photomic 1 was the first obviously). To see if the light works, on the right side of the scope there is a knob to adjust the light. Make sure the scope is in the off position when u plug it in then slowly turn the know to see if the light works. Just to give you an idea of the value, when this scope sold new, it was the same price as a fully loaded Cadillac car! I purchased a broken power source and a scope in rough shape for about what you are asking without the phase contrast extras you have! So you may want to adjust your asking price! :).