The Carson City Mint did not exist in 1842, so no Liberty Seated dollar dated 1842 could have a "CC" Mintmark.
Keep in mind that not all silver dollars have the CC mintmark. If your coin does have a CC mintmark it would be above the DO in dollar on the back of the coin.
You are going to have to provide the year the coin was minted - the mint mark 'CC' (Carson City) was minted on multiple year Silver Dollar coins.
Yes. It could have a CC or S mintmark.
There were no silver dollars struck at Carson City in 1887. Any 1887 dollar with a CC mint mark is a counterfeit.
The mint mark on Morgan silver dollars can be found on the reverse (tails) side, near the bottom, just above the letters "do" in the word "dollar."
The mint mark on all Morgan silver dollars is located on the reverse side of the coin just above the letters "DO" in the word "DOLLAR".
If you have a Liberty Seated Dime, the "CC" mint mark will be on the reverse [tails] side of the coin at the bottom and can be either inside the wreath or just below it. If you have a Liberty Seated Quarter the "CC" mint mark will be on the reverse [tails] side of the coin at the bottom below the eagle. If you have a Liberty Seated Half Dollar the "CC" mint mark will be on the reverse [tails] side of the coin at the bottom below the eagle. If you have a Lbert Seated Silver Dollar the "CC" mint mark will be on the reverse [tails] side of the coin at the bottom below the eagle. If you have a Silver Trade Dollar the "CC" mint mark will be on the reverse [tails] side of the coin a the bottom just above the "D" in "DOLLAR" If you have a Morgan Silver Dollar the "CC" mint mark will be on the reverse [tails] side of the coin at the bottom below the wreath.
The letters "CC" on any U.S. coin means it was made at the Carson-City Nevada Mint.
Please look at the coin again. No 1887 Morgans exist with CC mintmarks.
It will have "CC" in the mint mark position, on the reverse side above the DO in DOLLAR.
The Carson City Mint opend in 1869