Although listed as X-mount, it is actually a QBM mount. This is a Carl Zeiss Distagon 35mm lens for Rollei. It has the "made in west germany" engraving. It can be used with the Rollei SL35 or with an adapter. The filter attachment part is slightly warped. Therefore, it is being sold as junk. To the untrained eye, there was no change in the image quality, so I consider it usable. How about it for Rollei fans, old lens photography, or collecting? ※ I am also selling a Rollei Rolleinar-MC F2.8 28mm QBM in a separate listing. How about that one too? The following are comments from an amateur's perspective: Slight dust. No balsam separation. Other than that, there are scratches, etc. due to aging, but I think the condition is good for its age. Please judge the condition based on the photos. The following old lens review site may be helpful: https://allphotolenses.com/lenses/item/c_3185.htm If you have any other questions, I will answer them to the best of my ability. Negotiations are welcome in the comments. Included accessories are the lens body and lens cap (third-party). Cameras etc. are not included. Please refrain from purchasing if you are overly concerned about minor details. There are no pets or smokers in the household.