I was going through some pennies yesterday and came across a 1994D penny that has some extra bumps on the reverse side, one above the o in oF and one in between the ME. You will have to enlarge my pics to see it. Is this an error coin?
At first glance it does look like a possible error. If you are wondering if it could be valuable that would be doubtful. However, take that with a grain of salt since we are not too familiar with modern pennies due to their low collectible value. Hate to say this, but you would be better off asking elsewhere or bringing it to a local reputable coin dealer.
Your 1994D penny might indeed have an error! Those extra bumps you see on the reverse above the 'O' in 'OF' and between the 'ME' could be die chips, a common minting error that happens when parts of the die break and leave raised marks on the coin. Die chips often increase a coin's value slightly, especially if they’re prominent. Enlarging the picture can help verify this. Let us know if you need help with further identification!