Liberty Seated Half Dime Specifications

Liberty Seated Half DimeLiberty Seated Half Dimes were produced at the Philadelphia, New Orleans, and San Francisco Mint facilities.  As usual the Philadelphia minted coins have no mintmark.

New Orleans minted coins of the “no stars” and “stars” subtypes have the “O” mintmark located on the reverse within the wreath, under the denomination. For the “legend on obverse” subtype minted for only a single year in 1860, the mintmark is located under the wreath on the reverse.

The “S” mint mark for San Francisco issues would have the same location, although it was moved to the old location for the final years of the series. For several years both mintmark positions exist.

The Liberty Seated Half Dimes produced from 1837 to 1853 have a diameter of 15.9 mm and are struck out of silver (90%) and copper (10% composition). Uncirculated pieces weigh 20.6 grains (1.3 grams) and all have a reeded edge.

The specifications of the coins were changed in 1853 with the weight decreased to 19 grains (1.2 grams). The change was noted by adding arrows to each side of the date for coins issued with the new weight from 1853 to 1855. The arrows were removed the following year, although the modified specifications continued in use until the end of the series in 1873.