This item is a Asahi Pentax SMC Takumar/6x7 75mm f/4.5 Lens. This lens fits the Pentax 6x7-series cameras, including the 6x7, 6x7MLU and 67ii.
On the Pentax 6x7 camera, this lens has the 35mm equivalent field of view of a 35mm lens.
I have tested this lens on my 6x7 camera with film and it is fully functional. There is some internal dust, which is typical for a lens of this age and does not impact the quality of the images.
It comes with both front and rear lens caps.
It accepts 82mm threaded filters or 82mm Pentax bayonet filters. Aperture range is f/4.5 to f/22. Minimum focus distance is 0.7m / 27.5".