This Nikon RF 5cm f1.4 Nikkor-S Lens for Parts is in nice cosmetic condition with minor edge wear.  The aperture works well.  This lens appears to be missing an internal lens element,  The front element is present as well as the rear group.  It throws an image, but I have to tried looking through it on a camera.  The remaining glass is clean and clear.  Buy this for parts or repair, but please bid accordingly.