First, coins are not printed so there can be no printing error, they are struck or minted.
The mark on Lincoln is just damage, possibly from a vending machine.
It does look like a floating roof on the reverse. This is caused by polishing
the dies and can occur on any year Memorial cent. Fairly common.
The mark on Lincoln is just damage, possibly from a vending machine.
It does look like a floating roof on the reverse. This is caused by polishing
the dies and can occur on any year Memorial cent. Fairly common.






















