The sharpness grade is EF-AU. The question is, what is the black stuff? If it's crud that can be removed easily, it's a potentially nice coin. There still could be problems under the crud. If the black stuff is solid, it's corrosion, and that's not good.
I think it may have been the light and rubbish camera. I will try and get better pictures, thanks for the reply , allan
Don't forget to crop. I use a program called PhotoScape for FREE. Try it out. Also, try a little "acetone" on that bad boy.