This is a Manual Focus, Non-AI lens and will only mount on a limited set of cameras.  It will mount on a Nikon Df.

The focus is light and smooth, the aperture is snappy.  The aperture blades show stains from a previous oil problem, but that problem was resolved, and it works fine.

The appearance is nice overall, with minor wear.

The glass is clean except for a very few dust spots.  There is one that shows on the front, halfway between the lens center and the 10.5 marking on the bezel.  It looks to me like one of the mythical bubbles in the glass. 

Sample photos at f/16.

Comes with a front and rear Nikon cap.

Multiple shipping options.