Hi Bill,
My thoughts are that this is genuine, but only as a crude factory prototype. Kiev fit lenses would be suitable, namely, ZK Zorki, later to become Jupiter 9, 11, and 12. The 50mm would be the standard camera viewfinder, so not needed on a universal finder. 28mm, an expensive and rarely used lens, probably also considered unnecessary? (maybe?).
I bought this finder eight or nine years ago from a Russian family in a little known town in Uzbekistan. The sellers were a family who were packing up and going "home" after the break up of the Soviet Union.
Many Russian families were doing this at the time. They needed money to settle in Russia and wanted to minimise baggage that they would take with them.
I bought this finder for maybe five dollars, I didn't even know what it was, I had never heard of TSVVS or even Princelle at that time, neither had the family that I bought it from! They were selling all kinds of houshold goods that would have been difficult for them to take with them to Russia. This finder had probably been in their possession for a long time before I bought it. Perhaps left by a father. I remember that they themselves were not interested in photography and couldn't tell me anything about the finder.
I can't imagine anybody faking an item such as this, especially before the collapse of the Soviet Union. If somebody were to fake such an item they would not go to so much trouble and then crudely stamp the TSVVS logo. In fact they would have made the TSVVS logo the main point of attention.
At least those are my thoughts, but of course this wouldn't be the first time that I have been wrong!!!!



Cheers, Jim