Notes:The 1889-O Morgan Silver Dollar is slightly scarce in Uncirculated condition
and Gems are very challenging. The most
"common" Uncirculated grade is MS-63, followed by MS-62 and MS-64 in
nearly equal quantities. Prooflikes and Deep Mirror Prooflikes are
every bit as rare as those of the 1889-CC Dollar but are much less
expensive. The finest examples
certified by PCGS were 5 MS-66's, a single MS-66 Prooflike, and a single MS-66 Deep
Mirror Prooflike.

Sources and/or
recommended reading:
"The PCGS Population Report, October 2003" by The
Professional Coin Grading Service