Vintage Soviet technical lens Jupiter-9 85mm f/2 USSR №7304924. 15 petals. The technical lens may have been used in motorized devices. Lens block from a standard Jupiter-9 with a helicoid and aperture.
The focus ring and aperture ring are smooth and precise, but perhaps a little tight.
There is a slight play between the inner cylinder of the lens block and the outer rings of the settings.
There are fingerprints on the top lens, it looks like they are inside. There is a lot of oil on the petals. Everything is shown in the photo.