Crater. There is nothing out of the ordinary going on there. Take a look at this site to see DDO with 1968P LMC (https://www.coppercoins.com/lincoln...e=do&page=0) If you go to home page and select date guide you will find examples to help quite you. Best of luck.
Your title reads isn't doubled die,what do you think it is if not a doubled die? There are many types of doubling we all need to learn,here is a good link to study and book mark:https://koinpro.tripod.com/Articles...Doubling.htm John1
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