There are no US dimes dated 1812.
An "1812 Morgan head dime" doesn't exist: (1) There are no US dimes dated 1812 (2) George T. Morgan never designed any circulating US dimes (3) Morgan lived in the late 19th century, not the early part
what is the value for an American 1909 silver dime
Queen Elizabeth is not on the US 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."
a 1917 us dime is called a mercury dime. its not that rare so it is worth about a dollar
Face value only.
A 1988 dime is worth 10 cents.
The US discontinued its half-dime denomination in 1873.