Nikon Nikkor 24mm f2.8 Ais manual focus lens. Please Read

Nikon Nikkor 24mm f2.8 Ais manual focus wide angle lens in excellent condition focussing is smooth throughout the range,aperture works correctly and is free from oil but at some time in the past it looks like this has had some slight edge fungus which has been cleaned and left a mark inside the front glass ( please see last photo) this doesn’t affect the photos probably just needs a clean or service hence why I have listed this as parts not working.