This Nikon Nikkor 50mm f/1.8 Ai long nose standard prime lens comes with its original front cap. It has a red serial number and we cannot seem to find out why. There are a few scuff marks, scratches, and finish loss on the barrel's exterior. Its focus and aperture adjustments are both smooth. There is spotty haze and fungus inside of it but its glass is free of any separation to its elements. There is no oil on its aperture blades.