Value of silver Franklin dimes

Ummm, do you mean Roosevelt dimes? Yes, his first name was Franklin but a person's last name is normally used when talking about coins. The only coin with a picture of a Franklin (last name) on it was the half-dollar design issued from 1948 to 1963.

If you're referring to dimes dated 1946 to 1964, they're worth a minimum of 90¢ or so simply due to the amount of silver they contain. Beyond that some of the earlier dates have additional value to collectors, but you need to know the specific date and whether there is a small letter D or S on the back at the bottom of the torch.

There's a price guide at the Related Link below.