That's a Carson City Dime. (Carson City, Nevada) It's supposed to have the CC Mintmark. Not sure what you're saying about the CC's, but both of them should be there for a Carson City-minted coin.
It's not a fake or altered coin. It's a genuine Carson City Mint Dime, with a hole in it, and it's probably polished, from the photos.
You realize, of course, if I had posted that, I'd already be banned for life. I am on the moderators' "look for any excuse at all" list, after all.
@Fred Weinberg @Pickin and Grinin They made both in 1875... https://www.ngccoin.com/coin-explor...cid-29/1875-cc-below-bow-10c-ms-coinid-514673 https://www.ngccoin.com/coin-explor...cid-29/1875-cc-above-bow-10c-ms-coinid-514675