The first-year issue, made only at the Philadelphia Mint, was struck to the tune of only 52,000 pieces and has become the definite series key date. By 1917, the design had caused a controversy concerning public decency, as Miss Liberty?s right breast is exposed on the first manifestation of the design. The United States Mint modified the design during 1917, covering Miss Liberty?s breast with a chain mail. This design changed created two varieties during 1917, with Type I classifying Standing Liberty quarters from 1916 and 1917 bearing the original design and Type II quarters referring to all made from 1917 and on with the revised design.
Also in 1917, the reverse design with the flying eagle was slightly modified, resulting in the relocation of three stars (of 13 on the reverse) being moved from near the rim to just under the eagle. In 1925, the date on the pedestal upon which Miss Liberty stands was recessed into design at the same location, making it more difficult for the date to become completely obliterated through typical wear.
In addition to the rare 1916 Standing Liberty quarter, there are several scarce issues from the series. These include the 1921, 1923-S, 1927-D, and 1927-S. The 1918-S 8 Over 7 is a very scarce variety and the most popular of the series. No proof Standing Liberty quarters were struck.