I don't know if this is considered an error but I didn't know where to post it. Let's see if I've learned something... Is this a die chip causing this issue with the 9? I couldn't get a real good picture but I don't think it's PMD. It's like it poured out of the hole in the 9. If it's a die chip I've finally got that down pat. If it's not I'm still struggling lol. Also Lincoln's back has what appears to be machine doubling or die deterioration. It's raised up shadow across his back.
You did just fine. It takes time to learn about coins and this web site. It also takes time to learn about us.
If you click on Thread Tools you should be able to edit it. It's to the right next to "Watch Thread". assuming the clock hasn't ticked too far along.
Double die is incorrect. The correct numismatic terminology is Doubled die. Remember that! There is a difference. Good website - http://doubleddie.com/58222.html Good luck.
The correct term is Doubled Die so there's your first lesson. Lol There are numerous types of doubling but only one is worth any money as the rest are common. Worthless doubling is called NAV or No Added Value Doubling. MD is Mechanical Doubling DDD is Die Deterioration Doubling These are the two list common forms of doubling. The best coin to research for the correct doubling is the 1955 DDO Lincoln Cent. I'll leave the rest up to you. Have fun, learn and enjoy the hobby.
Small correction: Centrally located doubling holds a bit of a premium. Look at the 2009 "Double Thumb" (Minimum on Ebay: 15$) or the stronger 2019 extra doorway DDR's (Around 8$ a piece in sold) for proof.
Here is one of my favorite die chips, aka Interior Die Break. I call it "Lincoln's Purse". Doubled Dies are much, much harder to discern. Be prepared to "kiss a lot of toads before you find a prince!" ~ Chris