This is a rare vintage Schneider - Kreutznach PA-Curtagon 35mm f4 lens. Serial number: 10878134, made in Germany in the 70's for SLR cameras with Canon FD mount.
Will fit any camera using optional adapters. This is a special purpose shift-lens that can change the axis of the optics. Clean condition, with signs of moderate use on barrel. Optics are clean, just a little dust around edge inside.