I wanted a CC mint coin and was not particularly picky about what, so when I saw this one for cheap, I bought it. Having second thoughts, does the mintmark look kind of weird? Dealer's photos
Looks like it had a cud, and from my experience the cc's aren't always side by side the can be punched higher and lower of each other. There's a seated dimes site if you Google it and compare the mm.
Lots of different varieties and looks to the 1877-CC Fun coin. http://www.pcgscoinfacts.com/CoinImages.aspx?s=4683