Is yours the same diameter please Richard.
Also Prax have you weighed it mate ?.
The diameter ,weight and composition are surely the attribution.
I still think looking at the edge its copper,but the coin is bronze .....which would make me assume its not right ?.
Unless a coin was struck on a blank around the same time with the same weight..........but i cant think or know of one.
Not another mention i can find anywere makes note of a sample or any pattern of this year.
I am not the expert and find really interesting but have doubts.
Pete.