The mint mark position is the same on all Morgan dollars - above the letters DO in DOLLAR, on the back. Possible letters are:
No mint mark = Philadelphia
S = San Francisco
CC = Carson City (up to 1893)
O = New Orleans (up to 1904)
D = Denver (1921 coins only)
There are many sites that list mint mark positions for coins. Try http://www.collectorscorner.org/mark.html , for one.
It's on the back, near the bottom, just above the letters "do" in the word "dollar." If there's no mint mark, then it's a Philadelphia coin.
Not always, no. If it was minted in Philadelphia, then there is no mint mark.
The mint mark on any Morgan dollar is on the reverse above the letters DO in dollar.
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.
If it doesn't have a mint mark, that means it was made in Philadelphia.
The mint mark on any Morgan dollar is located on the reverse (tails) side, near the bottom, just above the letters "do" in the word "dollar."
If it has one, it's on the reverse above the DO in DOLLAR.
The O is the mint mark, it stands for the New Orleans mint.
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 "O" mint mark is from New Orleans
The mint mark on all Morgan silver dollars are located on the reverse of the coin near the bottom. Look above the "D" and "O" in the word 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 on Morgan silver dollars can be found on the reverse (tails) side, near the bottom, just above the letters "do" in the word "dollar."