When I managed to attach the lens an Ensign Selfix 420 with an extremely rare (as in there's nothing known) 107mm f3.8 Ensar lens (uncoated) which is clearly a precursor to the coated 105mm f3.8 Xpres of the Selfix 820 (it's identical except for the marked FL and lack of coating). The camera body and lens were bought separately, total cost about 10/$15.50. The lens came with shims and I'll check the Infinity focus and adjust if needed.

The Selfix 420 body can be used 6x9 or 6x6, and is itself a forerunner to the 820.