The lens is very clean, with only a slight amount of dust, which does not affect the photos. It has the same construction as Meyer, and the photos taken with it have the characteristic look of an old lens. The depiction of the scenery in the suburbs is very soft and beautiful. It is an M42 mount. If you would like the hood (new) shown in photo 4, please let me know. This hood provides excellent light-shielding and suits this lens very well. This is an extremely rare lens, with very few produced.