Out of curiosity, is the lens in a focusing mount? Does it have a 39 mm Leica-type screw thread on the end? (You say your uncle was a Leica fan). Never heard of the lens, but quite a few makers produced lenses in Leica-thread mounts. As this type of lens is relatively easy to make, the example you have might well work OK if in good condition. Rumours that this company also made a floating-element design called the Floating Votar cannot be confirmed