This is a base stand for a Ken-A-Vision Microprojector, Model X-1000-1. It is a gooseneck stand with the 150 Watt iodine quartz lamp, condensed cooling system and heat filter built-in. It is made of amolloy aluminum. It is 28 inches tall, 13 inches deep, and 12 inches wide. The microscope attaches at the top with two bars that come down behind the lamp. That would have your lens stage, lenses, rotating disc, and mirror. Ken-A-Vision went out of business in 2018 so those parts would need tracked down or find an alternative solution if you are not needing this for a replacement or other uses. A maker may also have a project this can be useful. Link to manual below

This unit is missing the microscope and is the base stand only which has the light, cooling system, and heat filter. It is in good working order. It has marks on it but no damage or defects.

Manual: https://microscopeinternational.com/content/PDF/catalog/ken-a-vision-microprojector-manual.pdf