the only Veginar I could find with Google was a lens on an old Yugoslavion slide projector sold on the French eBay. This makes me suspect your lens may be from those regions as well, possibly a relative of the Vega lenses sold on Kiev cameras? Perhaps you could ask Gevorg Vartanyan, who runs Araxphoto in Kiev and seems to be in direct contact with people from the Kiev factory (or what's left of it).
OTOH, I could be completely wrong in which case I hope someone comes along to correct me in my errors.
When I saw the title my first thought was 'let me guess, the bottom of a pickle jar?' Gorgeous photo! Get's high marks in the crappy old worthless lens category.
It certainly looks like a projection lens. Does it have an aperture? I had a few lenses from 1970s projection TVs which I played with. They were, as I recall, all long and fast triplets.