Here is one of the key dates from the Barber dime series, a 1915-S. Struck at the San Francisco mint with a mintage of only 960,000 pieces, it is one of only a handful of this series with a mintage less than one million pieces. As such, it is a key date, and this piece grades Very Fine, which is a highly collectable grade. A piece in this grade should be expected to bring about $30-$40. Neat!