This is an uncommon tele lens with a Leica LTM mount. It is meant for a Visoflex and will not focus at infinity on a camera.
It has a circular aperture with many blades.
This lens is in beautiful condition.Â It does have a small spot where it appears the coating has come off, but is otherwise clean and scratch-free. The focus and aperture are smooth although the focus is on the stiff side.