[Rover]

Huh... I tried adapting one to my camera but stopped quickly as it was leaking oil.
My country has a lot of positive features but the quality of optics coming out of it (especially the old ones, though I have no idea of the modern products, if any) is definitely not one of them.
That notion notwithstanding, I'd be curious to find and adapt that Industar lens I saw kicking around my parents' home in the days of yore... just for giggles.