I think that it either could be plated as @coop says or else the copper plating was mostly stripped off this coin, leaving behind the zinc core. This is an academic question though as your coin is only worth face value.
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
























