Thank you very much for viewing. This is a listing for a Wollensak Oscillo-Amaton 75mm F1.9 lens. This is a very rare lens, and its unique and beautiful bokeh is its charm. Please refer to the sample photos for examples. [Mount] ・Modified to M42 mount ・The original shutter mechanism is included, but its operation is not guaranteed (sold as is) [Optical Condition] ・The lens has been cleaned ・No mold or haze is observed ・No noticeable dust ・There are scratches on the lens surface (the impact on photography is subjectively judged) [Operation] ・The aperture blades operate normally ・No oil stains are visible ・However, the aperture lever is somewhat stiff and requires relatively strong force to operate [Appearance] ・Generally in good condition for its age, but there are some scratches, etc. due to use and storage ・Please check the photos for details [Other] ・This lens is characterized by its very soft and dreamy bokeh ・Recommended for collectors and vintage lens enthusiasts ・Front and rear caps are included ※Due to being an old lens and a modified item, it is sold as is. ※Please purchase only if you agree with the condition. ※We are sorry, but we cannot accept returns or refunds. ※Since there is no M42 option in Mercari's mount selection, it is listed as "Nikon F", but this product is an M42 mount modification. Please note that it is not a Nikon F mount. If you have any questions, please feel free to comment. Thank you very much.