If it's a small letter below the date, it's a mint mark indicating the coin was struck (not "stamped", btw) at the San Francisco mint. S-mint coins are sometimes worth a bit more than ones from Philadelphia or Denver, so you might want to post a new question with the coin's date.
If it's located anywhere else it was added by someone after the coin was struck, and the coin is only worth a penny because it has been damaged.
i have a1952d penny with an J and an S stamped on it.......by it;s face....
The S is the mint mark for San Francisco.
I have a nickel that is a color of a penny I have a nickel how much is it worth
i have a penny ,the back is stamped ,the front is slightly stamped like an outline of the face , maybe 2 numbers ,very hard to see
one penny
The worth of a triple stamped penny will vary depending upon its circulation and overall condition. It can be worth anywhere from $1.00 to thousands of dollars.
I have a 1980 penny with Martin Luther King Jr.s head stamped on it next to Lincoln's head and I have a co-worker who collects coins who says it is not worth anymore than a penny because it was not stamped at the mint. It is stamped not rsised as part of the coin.
A new penny blank planchet is worth $1.50.
1¢
J.C. Penny
They are worth about 6 or 7 dollars the last time I checked. I have a bunch of them. Quarters are worth about 15 dollars. I once had a penny with a nickel stamped on it, I sold it for $80.
Take it to a collector