@MS, first welcome to CCF. Second, I agree with @CWB, that your coin has begun to corrode from exposure of the zinc core. The raised section is most likely from this process, but a close-up photo (straight on, well lit, in focus, and well-cropped) would let us confirm that it isn't something else.
"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





















