If you have a copy of the Red Book, you will learn that all Lincoln's struck after 1982 were 95% zinc with a thin, outer layer of copper. Chris
It looks like it was polished/buffed and the high points were worn off. It was probably angled a little to the right, that's why you see exposed zinc on that side of the rim and the date. Usually, you see telltale scratches but this must have been a very fine grit.