Due to the discovery of bag quantities in the mid 20th century, the 1899-O Morgan dollar is one of several issues in the series where uncirculated specimens are about as common as circulated pieces. In this case, the 1899-O Morgan dollar is readily available through MS65, with MS66s scarce, MS67s extremely scarce, and MS68s exceedingly rare. PLs and DMPLs are scarce in all grades, transitioning to rare in the Gem levels.
| Country | United States of America |
| Year | 1899 |
| Serie | Morgan Dollars |
| Denomination | $1 (One Dollar) |
| Mint | New Orleans |
| coinage-type | Morgan silver dollar |
| desg | MS |
| designer | George T. Morgan |
| diameter | 38.1 |
| edge | Reeded |
| fineness | 0.9 |
| material | 90% silver; 10% copper |
| mint-mark | O |
| mintage | 12,290,000 |
| ngc-id | 256C |
| obverse-description | Portrait of Liberty centered. On the left are found 7 stars with the words E*PLURIBUS*UNUM followed by 6 stars on the right. The date is positioned at the bottom. |
| pcgs-link | 7260 |
| pcgs-number | 7260 |
| reverse-description | The heraldic eagle is centered holding a bunch of arrows and branch surrounded by and olive leaves. The words UNITED STATES OF AMERICA * ONE DOLLAR frame the periphery. Mint mark, if any, appears above the letters DO of DOLLAR. |
| weight-grams | 26.73 |
| weight-ounces | 0.943 |
| year-display | 1878-1921 |