Rare vintage Roeschlein-Kreuznach Luxon 50mm F2 lens, originally made for Paxette cameras. It has M39 screw mount, but with a unique register distance. I haven't seen a ready adapters for this mount, but I include a custom made adapter for Sony FE mount. Lens is in a good shape for it's age, optics is clear and free from fungus. Lens produces a very distinct vintage images, especially wide open - very swirly bokeh, unique flares at certain angles to light sources. I included few images made with it on Sony A7 camera.