That is die flow.
Metal striations happen when a die movement pushes the devices to leave a line from the edge of the device onto the coin.

Seen on the lower edge of the devices on the date.

The OP's coin is in the LDS/VLDS age of the die. These appear and add wrinkle looking appearance to the coin. Usually wrinkles denote age. So it is a die reaching retirement.
Metal striations happen when a die movement pushes the devices to leave a line from the edge of the device onto the coin.

Seen on the lower edge of the devices on the date.

The OP's coin is in the LDS/VLDS age of the die. These appear and add wrinkle looking appearance to the coin. Usually wrinkles denote age. So it is a die reaching retirement.





















