Re: 1841 "O" dime
Be sure you hold that puppy with one finger on each side, touching only the edge of the coin. I'd certainly get it slabbed. Looks to be Mint State, although I can't see how many scratches and/or bag marks because of the quality of the pics you posted. Could grade as high as MS-65. A 1993 Blackbook of coin prices lists the dime at $1,250 in MS-60 (the lowest uncirculated grade). Careful with that one, and I'd certainly think about getting it professionally graded and slabbed.
All the Best,
Buckleboy