I have one, not sure exactly what flavor. They come in several forms. Mine has a "Pantar 45mm f2.8" lens, and most of the slow shutter speeds are way off. It was in a "free" bin at a local camera shop.
I haven't found it worth much more than that, the lens isn't all that great. What little I did do to investigate getting it CLA'd made me realize it's best as a curiosity. AFAIK there's like one guy out on the US west coast somewhere who may be able to service them. But he has no web site.