Look on the back of the coin to see if there's a small mint mark letter. It may be blank or there may be an O or S.
Numismedia lists the following approximate retail values as of 02/2011:
No mint mark (Philadelphia):
Very worn condition - $12
Moderately worn - $15
Slightly worn - $21
Almost no wear - $137
Uncirculated - $252 to $5,910 depending on quality
"O" mint mark (New Orleans):
Very worn - $18
Moderately worn - $40
Slightly worn - $75
Almost no wear - $440
Uncirculated - $880 to $25,000
"S" mint mark (San Francisco):
Very worn - $144
Moderately worn - $480
Slightly worn - $660
Almost no wear - $2,052
Uncirculated - $3,900 to $17,190
DISCLAIMER: The retail values quoted are the best available as of the date shown, but may vary significantly due to changes in the precious metals market. Also the wholesale (buying) price of a coin will be less than the selling (retail) price. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
The value of a US dime marked "ten centavos" is zero, since it is a fake. A real US dime is marked "one dime," not "ten centavos."
Dimes from 1858 carry a portrait of Miss Liberty and say ONE DIME on the back. Cents from 1858 have a flying eagle and say ONE CENT on the back. You did turn the coin over, I assume... Please determine which you have and post a new question with the corrected information.
a 1917 us dime is called a mercury dime. its not that rare so it is worth about a dollar
Face value only.
The US discontinued its half-dime denomination in 1873.
what is the value for an American 1909 silver dime
The value of a US dime marked "ten centavos" is zero, since it is a fake. A real US dime is marked "one dime," not "ten centavos."
Dimes from 1858 carry a portrait of Miss Liberty and say ONE DIME on the back. Cents from 1858 have a flying eagle and say ONE CENT on the back. You did turn the coin over, I assume... Please determine which you have and post a new question with the corrected information.
a 1917 us dime is called a mercury dime. its not that rare so it is worth about a dollar
A 1988 dime is worth 10 cents.
Face value only.
10 cents
10c
The US discontinued its half-dime denomination in 1873.
The 1965 dime is a Roosevelt dime. This dime does not carry a mint mark and there were 1,652, 140,000 of them minted in the U.S. They have a value of between 10 cents and 2 dollars.
A US dime dated 1944 is a Mercury head dime, it's very common with a value of $2.00 just for the silver.
The British have never produced a "Dime" coin. The "Dime" is a US 10 cent coin.