Issued to honor Women's Rights leader, Susan B. And unlike most modern proof coins it was produced at the principal mint in Philadelphia not at the San Francisco branch mint. This 1999 proof dollar is also unusual because it is was not part of the years proof set, which did not contain a dollar coin at all. Although the new small Sacagawea dollar was to debut the very next year, additional dollar coins were need to meet the needs of vending machines. That's the longest interruption between two coin dates of the same series in U.S. Anthony dollar was unexpectedly reintroduced in 1999 it had been 18 years since the previous issue was minted.
