This 50mm f1.4 Nikkor-S is an early Nikon lens, back when Nikon was still Nippon Kogaku. Optically in good condition, with only minor dust; focusing and diaphragm action are good. This lens has been AI-modified, so it will fit on many modern Nikon cameras- though it’s not the cleanest job, so this might not be the right lens for you if you’re precious about cosmetic condition. Also, there’s an engraving on the barrel. A good working lens, though.