This is a very nice Nikon 5.8cm f1.4 Nikkor-S lens for the Nikon F camera. Serial number is 159866. These were only on the market from 1960-62. This one has the ridged aperture ring. The barrel of the lens shows what I would call normal wear for a lens of this age. The glass is perfect with no haze, fungus or scratches. Focus and aperture are smooth. No oil on blades. Comes with the original front and rear caps, a chrome Nikon filter and a Nikon hood marked for this lens.