In addition to the 1895-O, the series contains numerous semi-key dates, including 1895, 1896-O and -S, 1901-S, 1903-S, and 1904-S.
Some dates are relatively common, but very difficult in higher grades (such as the 1909-D). The series has been gaining
popularity in recent years, and is obtainable in most grades with some diligent searching (excluding the 1894-S of course!).
The best single reference on this series is The Complete Guide to Barber Dimes by David Lawrence, with detailed
information about the series, and date-by-date analysis. This is an indespensible reference for the Barber Dime collector.
Barber Coin Collectors' Society