There is a table in the current Red Books for wrong planchet coins. 1964 being common but dimes of that year being silver would have me looking for that info toward the end of the book. Nickel struck on silver dime planchet.
Now if it is a copper nickel planchet, it would be worth more probably a considerable amount because of the date being from the silver coin era.
Now if it is a copper nickel planchet, it would be worth more probably a considerable amount because of the date being from the silver coin era.


















