Liberty Seated Silver Dollars were produced at the Philadelphia, New Orleans, San Francisco, and Carson City Mints from 1840 to 1873. The coins were struck from a composition of 90% silver and 10% copper, with a weight of 26.73 grams and diameter of 38.1 mm. All have a reeded edge.
As usual, Philadelphia coins do not carry a mintmark, while coins struck at other facilities have the mint mark (O, S, or CC) on the reverse of the coin below the eagle. Mint marks appear in in various sizes, but the difference is seldom noted. The location is usually a good identification of particular varieties, although the silver dollars are seldom collected by die variety.
Production quality varies greatly with every issue. Generally, the New Orleans and Carson City issues are less well struck than those of the Philadelphia and San Francisco Mint, although exceptions exist. The obverse stars, eagle’s wings and centers of both sides are particular prone to weakness. Another good indication for the strike is the foot of Liberty, which is seldom complete on coins of this type.