2023 P Nickel: Doubled Master Die

Wow, I'm a little surprised that you've been looking at 2023 Jefferson nickels and had not yet seen Jefferson's morning paper. Of the ones I've checked out, I would say that about two-thirds have that feature.

Whatever that is, it isn't a die chip—that object appears on millions of coins across multiple years. It's some sort of manufacturing mistake or damage to the master die or master hub.

http://goccf.com/t/449313#3875600

maybe a master die dent?

That begs the question of whether the Mint is currently using multiple master die per year. We know that the feature appears across 2022 and 2023, and also that it does not appear on most 2022 and on some 2023. It could also indicate something as simple as the Mint replacing the master die in late 2022 because it was wearing badly, or that the master die picked up that gouge or dent late in the 2022 hub manufacturing process.

Does it appear on Denver minted nickels at all? That would also tell us something.