U.S. silver coins struck for circulation before 1933, such as Morgan and Peace dollars, Barber and Walking Liberty halves, Standing Liberty quarters and Mercury dimes. These coins were struck in .900-fine silver; a Morgan or Peace dollar weighs 26.73 grams and contains 0.7734 troy ounces of silver. Peace dollars were not struck from 1929 to 1933, so pre-1933 Peace dollars date from 1921–1928. Weights and mintages are cataloged in A Guide Book of United States Coins (the Red Book); mintage records are published by the United States Mint.
Brilliant Uncirculated: original mint luster with no wear. It is a commercial grade for uncirculated coins that are not numerically certified.
A .900-fine silver dollar minted 1921–1935 and designed by Anthony de Francisci. It weighs 26.73 grams and contains 0.7734 troy ounces of pure silver.
Morgans (1878–1904 and 1921) are older with more key dates; Peace dollars (1921–1935) are generally more available in BU at modest premiums over melt.
Generally not as collector items; IRS eligibility is limited to coins meeting the Section 408(m) fineness standards (.999 fine for silver). Confirm with your custodian.