Posted 07/09/2020 10:01 am
On the last image you can see die flow images on the left sides of the devices. So this is not a Machine Doubling issue. It is a die wear issue and the die ages the devices make a move for the closest rim direction. Why does this happen? The metal on a planchet is re-arranged on each strike. The metal movement starts on the central area and moves outwards to towards the collar. The left over metal outside the die and between the collar forms the rim. Well this sound pretty much normal, but when this is repeated almost a million times, that metal movement alters the die. Die flow lines form on the fields. The direction of the push alters the devices moving the metal in that direction. Thus as the die ages, it shows its are by lines of the the fields and devices of die wear. That is what had happened to your coin. A senior die struck your coin.
