Leitz N 4x Filter For Leitz MR-Telyt-R 500mm f8 Black + Box

Like new black Leitz N 4x filter for the Leitz MR-Telyt-R 500mm f8 lenses in Leica R mount. Basically no visible signs of use. Glass is perfect. Comes with box. The picture shown is not an actual picture and the filter might look a bit different compared to this one. Condition however is as described.