It's one my Dad had and used to copy historic photos and documents. I need it for the same purpose and also to copy large needlework.
This thing is old - originally made for using with a Polaroid Land camera - it's a Polaroid 208 Copymaker. But it has a good solid base with a gauge plate for squaring up the item to be copy, lights at 45 degree angles on both sides for even lighting, and a solidly mounted adjustable stand for the camera. My Dad adapted the camera mount for a standard camera screw mount and also added a taller post so the camera can be raised significantly.
One very similar to mine is at
http://www.josephfazzio.com/polaroid-208-copymaker-115vac-20watt-afh242
First major problem - the timer for the light on one side is inaccurate and very noisy. I'm planning to rewire the thing to bypass this timer. I will always need both lights on at the same time and as it stands, the light on one side switches on, the one on the other side only comes on with the timer.
Second problem - the bulbs. Both currently work so I'm good for now, though I would rather have full spectrum or daylight rather than the cool white bulbs on there now. They are Sylvania Cool White 3W F3T5/CW z458 12" straight tubles. So far I haven't found replacements, though I have only started looking.
I'm wondering if I have to rewire the thing if I should look for replacement fixtures with easier to source bulbs?