Looks like it is missing the upraised rim.. I say damage and altered. What does the other side look like?
It Looks like a blank of some sort. What is the Diameter and Weight ? Does it stick to a magnet? Can you get photo of the edge?
Take a photo of each side with a Quarter beside it, then post so we can compare and give detailed answers. Welcome to CT.
Doesn't look like a US blank, but we need the weight of it, in grams or grains.....and an edge photo would be nice.