Notes:
The finest examples graded by PCGS are 5 MS-67's, 7 MS-66 Prooflikes, and 4 MS-65 Deep Mirror Prooflikes.

The finest "Micro O" example graded by PCGS is a single AU-50.

In April 2004, PCGS announced the discovery that the Micro O versions of the 1896-O, 1900-O, and 1902-O Silver Dollars were all counterfeit.

Recent appearances:
NGC MS-67.  Ex - Heritage Numismatic Auctions, Inc.'s "Long Beach Signature Sale", May 31-June 2, 2001, Lot 6642, illustrated, sold for $4,715.00 From the holdings of Andy Hansen

NGC MS-67.  Ex - Bowers & Merena Galleries' "The Lake Geneva Sale", June 28-29, 2001, Lot 1156, illustrated, sold for $4,830.00

PCGS MS-66.  Ex - Heritage Numismatic Auctions, Inc.'s "Long Beach Signature Sale", May 31-June 2, 2001, Lot 6641, not illustrated, sold for $632.50

PCGS MS-65 DMPL.  Ex - Bowers & Merena Galleries' "The Rarities Sale", January 3, 2001, Lot 394, illustrated, not sold; Ex - Bowers & Merena Galleries' "The Lake Geneva Sale", June 28-29, 2001, Lot 1157, illustrated, sold for $3,105.00  From the Jack Lee Collection

Sources and/or recommended reading:
"The PCGS Population Report, April 2005" by The Professional Coin Grading Service