1975 DDO No Mint Dime . ( No Preconceived Notions) I'm Just Curious

to the CCF With these pictures, I don't see any doubling at all. There are no known DDOs for 75. http://varietyvista.com/index.htm

to the CCF

Also, lose the no mintmark - it mostly brands you as a clueless newbie who has watched too many clickbait YouTube vids. Once you have even a small clue, you are better than that!

The proof dimes without the mintmark are properly called "No S". And they are incredibly rare, PCGS having graded just two. Which are clearly proof (PF66 and PF68). NGC doesn't even list the variety.

Which is more likely? That a random circulated dime was one of the 585,673,900 circulation quality dimes struck in Philadelphia? Or that it was a 3rd proof, was removed from a proof set, entered circulation and you found it?

As for no mintmark = Philadelphia, as the original mint, they only used the P mintmark for the War Nickels (1942-1945) to show they were 35% silver. And then in 1979 with the Susan B. Anthony dollars followed by all regular coins 1980 and later from the nickel up.

The 2017 Lincoln Cent is the only Lincoln Cent with a P mintmark to commemorate the 225th anniversary of the founding of the mint.

Now if you want to chat about American Silver Eagle Bullion coins (ASEs), yes, there are a bunch of shenanigans with the P mintmark there.

Not only not a DDO, but not even seeing any MD either.