Why would a dime be:
- larger than a nickel? (and presumably heavier?)
- Have the same portrait on both sides?
- Us a portrait not used on any dime, or any other US coin?
- Have strange radiating lines out from the portrait?
I'm sorry, but if you're seeing such words, it's just your imagination showing you what you want to see. Your photography is excellent enough to clearly demonstrate that they're not really there.
It 100% guaranteed isn't an American coin, and it isn't a coin from anywhere else either. It's a jewellery medal that someone has removed from it's piece of jewellery, and then rubbed in gravel for some reason.
We've told you what it is. You don't have to accept this truth, but your disbelief in the truth will not change it.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis