The mint mark on Morgan dollars is located on the reverse side, towards the bottom, just above the letters "do" in the word "dollar."
The "O" mint mark is from New Orleans
The O is the mint mark, it stands for the New Orleans mint.
An 1882-O Morgan is a common New Orleans Mint coin. Circulated examples are $30.00-$37.00. Typical Mint State coins are $40.00-$50.00
7-8-11>>>An 1890-O Morgan is a common New Orleans Mint coin. Circulated examples are $38.00-$45.00. Typical Mint State coins are $50.00-$60.00
New Orleans mint mark is "O".
A simple answer is the 1893, 1895 & 1903 Morgan dollars from the New Orleans Mint typicaly have the highest values.
The o and the s are mint marks, and indicate that the coin was minted at the new Orleans, or the San francisco mint. It should be just below the date on the front of the coin, and (for old eyes like mine) is small enough that it can be hard to read.
The 1900 Morgan dollars issued from the New Orleans Mint are known to have medium size mintmarks. This is not a recognized variety. The 1900-O Morgan is considered common. AU grade coins currently have values of $35.00-$40.00.
Assuming the coin is circulated, retail value is $26.00-$32.00 depending on how much wear the coin has. The 1902-O Morgan is a common date New Orleans mint coin.
The mint mark position on all Morgan dollars is above the DO in DOLLAR on the reverse. In 1881 these coins were struck at 4 mints: Philadelphia - no mint mark San Francisco - "S" New Orleans - "O" Carson City - "CC"
If you mean a Morgan Dollar coin? The 1883-O (New Orleans) Morgan is common, retail values are $17.00-$26.00 for circulated examples.
The 1888-O Morgan is a more common New Orleans Mint coin. Assuming it's circulated, average values are $32.00 to $44.00 depending on the actual grade of the coin.