Roeschlein Kreuznach 105mm f4.5 Luxon C Lens
The very uncommon 105/4.5 Roeschlein Luxon C lens, #67795, was recently acquired. It features a manual diaphragm with f/stops from f/4.5 to f/32. It focuses from infinity down to just under 5 feet.
This is the first Roeschlein lens that I have encountered in Exakta mount so I feel that it is very uncommon.