There were two different silver dollar types issued in 1921, as they phased the Morgan Dollars out, and introduced the "new" Peace Silver Dollar.
If it's a Morgan, this is the most common date in the series, and an AU would retail for about $30. If it's a Peace Dollar, the retail price would be closer to $120.
A 1895-S Morgan dollar certified as AU-50 has a current average market value of $1,700.00.
In EF about $375; in AU about $1900.
The 1921-S Morgan is very common in all grades, if slightly circulated is a grade of AU-55 or AU-58 retail prices are $20.00 and $23.00
Try again; there weren't any Morgan dollars minted that year.
This coin is the most elusive Carson-City Mint issued Morgan dollar. Only 350,000 were made. Average market value is in the $10,000.00 range for AU-55 graded examples.
AU stands for "About Uncirculated" and is not a code it's a grade. If you mean a mintmark? If the coin has one it's on the reverse above the letters DO in DOLLAR.
I would like to find the value of a 1896-0 liberty dollar value
1883 Morgan dollars are very common. Coins in the AU (about uncirculated) grade range have values of $22.00-$26.00
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.
The 1886-S Morgan Dollar is a better date/mint coin of the series, but it is common and average retail values per grade for circulated coins are: G-4 $29/VG-8 $41/F-12 $54/VF-20 $76/EF-40 $89/AU-50 $130/AU-53 $150/AU-55 $155/AU-58 $204
AU means almost uncirculated which is a grade for the coin, depending on the grade on the coin and the year of it, the value of the coin can be from $25 for the most common and lowest grade dollars all the way to $575,000 for the second highest grade, most rare silver dollar(1893S)(no proof 70 silver dollar has ever been found)
Retail price range for AU coins is $23.00-$30.00