Info on Unity One Rotary Platform turntable?

I have a Unity One Rotary Platform with a Grace F9E cartridge that I bought about 20 years ago. It is belt-driven, totally manual, has a very heavy brass(?) platter and has a fully de-coupled dust cover resting on a foam gasket. It produces superb sound. At the time I bought it I was told it was comparable and to the Rega Planar 3. My understanding is that Unity One went out of business years ago, and I cannot find any information on the company or the turntable. At the very least I am curious to know more about this sweet piece of technology, and I am considering selling it. Any info people can give me would be appreciated.

Thanks,
Barry