Found this 1980-D Lincoln Cent with a strange discoloration only on the right side obverse - under microscope, doesn't appear to be paint or chemical and is not raised or textured/flaking or spread onto the rim. I'm stumped - would love some thoughts on what this is (even though it isn't valuable, just curious when I discover things I haven't seen before). Thanks and I love the site and all of the great information I have found on here. Cheers.
Excellent - thanks for the quick responses! So comforting to know that after being out of the hobby for 20+ years that there is a helpful community of experience to fall back on. Happy hunting! Jeff