No its not. The letters are the initials of Frank Gasparro who designed the coin. The only mint marks used today on dollar coins are P, S, and D.
By the mint mark on the reverse of the coin, but silver dollar coins with no mint mark are made in Philadelphia
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.
No mint mark indicates that the coin was minted in Philadelphia.
No mint mark means the coin was minted in Philadelphia.
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 is under the date, and there is no silver in the coin actually the d is above the year.
By the mint mark on the reverse of the coin, but silver dollar coins with no mint mark are made in Philadelphia
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.
No mint mark indicates that the coin was minted in Philadelphia.
No mint mark means the coin was minted in Philadelphia.
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 mintmark is on the reverse of the coin underneath the "One" in "One Dollar"
No mint mark indicates that the coin was minted in Philadelphia.
1892 Liberty silver dollar mint mark in on the reverse just above and between the D and O in Dollar at the bottom of the coin. Mine is marked with an S.
If the coin has a mintmark, it's on the reverse above the letters DO in dollar.
The coin was minted in Philadelphia, PA.
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".