The Susan B. Anthony Dollar, commonly referred to as the SBA dollar, was issued by the United States Mint in recognition of women's rights activist Susan B. Anthony. The coin was first released in 1979 and produced in subsequent years, with notable mintages in 1980 and 1981. The 1981 Philadelphia strike is of particular interest to collectors, as the coin features an obverse depicting Anthony's profile and a reverse showcasing an eagle landing on the moon, symbolizing the historic Apollo 11 mission. The SBA dollar has a unique copper-nickel composition and measures 26.5 mm in diameter, making it similar in size and appearance to the quarter dollar, which sometimes led to confusion in circulation.

Item Denomination Series Year Mint
1981-P SBA $1 SBA $1 Susan B. Anthony Dollars 1981 Philadelphia