Assuming the coin is circulated and still in collectible condition, the 1889 Morgan dollar is a high mintage common date coin. Average retail values as of 8-30-11 are $38.00-$44.00 depending on the grade of the coin.
Remember, Philadelphia didn't start using the P mint mark on coins until 1979/80 (except on nickels minted during WWII). So any coin from the 19th century that doesn't a mint mark was struck in Philadelphia.
Assuming the coin is circulated, the 1902 Morgan is a common date. For an accurate assessment of value the coin needs to be seen and graded. Most coins have seen heavy use and show a lot of wear. In general retail values for circulated coins are $25.00-$45.00. Values are a market average and only for coins in collectible condition, coins that are bent, corroded, scratched or have been cleaned have far less value if any to a collector or dealer.
Current retail values for circulated coins are $17.00-$26.00 depending on the grade.
It has no more valu than the name suggests. Its worth 1 dollar
Any U.S. coin issued for circulation with no mintmark was made in Philadelphia.
The value of 1889 Morgan silver dollar replica ranges from $23.01 to $26.76
The most common Mint State grade for an 1889 Morgan dollar is MS-63 and retail value is $53.00
The mint mark (if it has one) on all Morgan silver dollars is on the reverse of the coin just above the letters "DO" in dollar.
The mint mark on a Morgan dollar (if any) will be found on the reverse of the coin under the wreath between the "D" and "O" in "DOLLAR".
The mint mark on all Morgan silver dollars is located on the reverse side of the coin just above the letters "DO" in the word "DOLLAR".
The mint mark (if it has one) on all Morgan (1878-1904 & 1921) silver dollars is on the reverse of the coin, just above the letters "DO" in dollar.
$27 to $350,000 depending upon the mint mark and the condition of the coin.
If your coin actually is a Mint State 1889 Morgan dollar, typical MS coins are $50.00-$75.00 depending on grade.
On Morgan dollars (the type minted at the time), the mint mark is on the back, towards the bottom, just above the letters "do" in the word "dollar." And if there's no mint mark, it means it was minted in Philadelphia.
The mint mark on any Morgan dollar is on the reverse above the letters DO in dollar.
The San Francisco Mint
Not always, no. If it was minted in Philadelphia, then there is no mint mark.