I see it. It's hard to tell from the pics whether it's part of the verdigris and dirt. Tommy, I wouldn't risk hurting the coin to find out. Get a powerful magnifying glass if you need to look further at it. Verdigris and dirt can really be a tricker. I've seen that on my copper coins, confusing it with die errors.
I'm not sure--it merits a closer look. For doubled dies, I look for some signs of notching in numbers or letters. However, some doubled dies don't show notching, and it also depends on how the dies were made too. Most of my doubled dies have notching such as this (black arrows): But notching is more apparent on older coins with serifs. Other doubled dies I have are outside the usual norm. Here's an Australia penny with very wide rotational doubling--so much that there's no "notching". This also has some MD on the STR. Here's another weird doubled die from Australia. Nothing is actually "doubled", the design elements and letters are highly distorted--the oval dots and skewed star are a giveaway. This is called Class VI distended doubled die.
Yes--there are a lot of dramatic Class VI doubled dies on Lincoln cents--I just don't own any myself.
I have the same coin, mine appears to be double died on the reverse. Can someone help please? Thanks.
The correct term is Doubled Die - I want to share this webpage with you - https://en.wikipedia.org/wiki/Doubled_die Quote - "Note that the proper terminology for this occurrence includes the letter 'd' at the end of the first word, hence "doubled die". The term "double die" without the first word ending in 'd' is not proper numismatic terminology" closed quote