If this were a doubled die, then I would expect to see the same doubling to carry over to the tops of these devices?

Even flat field doubling can appear on bottoms and upper part of the devices:

Machine damage on the devices carry upward:

So I'm feeling this is
Die Deterioration as well on the OP's coin. Die wear first shows on the outside edges of the devices that face the rim. I see nothing on the upper parts of the devices.