Based upon the look of Lincoln's forehead and around his' eye and nose, I would say that someone tried a little fooling with some tooling! Frank
2006 nose I took another closer look, the mark on his nose appears to have little waffle like markings...and I will be dern, but I see another eye in the mix...I am taking it tomorrow to the coin guy and I will let you know the outcome.
Now, a double-eye is a possibility. There are many double eye, double eye-brow, etc. coins out there. Like you said, take it to an expert if you have any doubt. Good luck. Don't let them charge you to much.
A classic "bullet missed his head" error and only nicked his nose. Now seriously keep it for now. Who "nose"? - but I doubt you'll get rich from it.
I saw a few other 2006's with a hint of something on his nose..but nothing like this one. I don't plan to get rich with my pennies..but I love the hobby.