Over even the 25 cent gumball machines. Something mechanical made that mark on the coin. It wasn't there when it was struck. If it were a mint error, it would be raised, not incuse. (IE: it the collar had a crack on that area, the line would be raised, not incuse)

Note the affected reed edge on this coin? The affected area is raised because of the crack/break of the collar. Yes the collar is also a die. If makes the flat or reed outside edges of the coins. So the strike happens on the coin all at the same time, in a single process. Any crack/chip/break will leave a raised area on the coin. Not an incuse mark except the the Dollar coins, where the collar has the devices on the collar that are raised on the collar edge on these strikes.
CoopHome: How do the reed/flat/incuse edges get formed on coins? collar purposes

Note the affected reed edge on this coin? The affected area is raised because of the crack/break of the collar. Yes the collar is also a die. If makes the flat or reed outside edges of the coins. So the strike happens on the coin all at the same time, in a single process. Any crack/chip/break will leave a raised area on the coin. Not an incuse mark except the the Dollar coins, where the collar has the devices on the collar that are raised on the collar edge on these strikes.
CoopHome: How do the reed/flat/incuse edges get formed on coins? collar purposes























