I know of no reason why this would add value.
REVISED ANSWER, the sender wanted clarification:
I took a second look. It looks like damage. I don't know how you can determine how it got there. There are some mint errors, if significant or dramatic, that are valuable. But hundreds of times a month people send me pictures of coins with odd markings and stains--scratches, dings, everything under the sun. You can read all about them on my site. Not every unfamiliar mark on a coin originated from the mint, and even if it did, in many cases it detracts from the value of the coin because it makes it ugly and there isn't anything inherently interesting about it.
The value of your coin is somewhere between what you want for it and what someone is willing to pay. I'm willing to pay 25 cents, but that does not mean someone wouldn't want to pay more. If you find that someone, I have many coins I'd love to sell with all sorts of imperfections and oddities!
I hope that helps.
From: Christopher L Martin <email@example.com>
To: Marc Rosner <firstname.lastname@example.org>
Sent: Sun, Oct 10, 2021 6:57 pm
Subject: Re: A reply to your appraisal
Dont mint flaws hold value. I can tell you that is wasnt put on there from a person. Its to smalland cimetrical. Why wouldnt it be of value?
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