Thank you for viewing. Instant purchase is OK. This is a close-up adapter for Leica's collapsible Summicron. It is compatible with Barnack Leica. The grease in the helicoid feels dry, but it is usable. I am selling it because I have sold my collapsible Summicron. There are no noticeable large scratches, but it is old, so it has a corresponding aged feel. It comes with a box, but it has deteriorated over time. Please check the photos. Thank you.