No Mintmark just means it was made in Philadelphia.
There is no mint mark on the 1921 Peace dollar because they were all minted in Philadelphia and thus carry no mint mark.
yes, in fact according to my book none of them have mint marks
The 1928 Philadelphia Peace Dollar has no mint mark, indicating it was minted in Philadelphia. A normal 1928 Peace Dollar would have a D or S mint mark denoting it was minted in Denver or San Francisco. The absence of a mint mark on the coin indicates it is the Philadelphia Mint version.
It's on the back below the ONE no mark means Philadelphia.
This is a Peace dollar. The mintmark for Peace dollars is located on the back to the left of the eagles wingtip. Keep in mind it may be blank if it was made at the Philadelphia mint.
The 1926 Peace Dollar was minted in three locations: Denver ('D'), San Francisco ('S'), and Philadelphia (no mint mark). The 'S' coin, as its mint state condition improves, carries the highest value. If a Peace dollar has a mint mark, it's located on the reverse side between the word ONE and the eagle's tail feathers.
The only mint marks a Peace dollar can have are a "D" or "S". Philadelphia didn't use a "P" mint mark on $1 coins until 1979. Please see the Related Question for more information.
1923 makes it a Peace dollar. The mint mark is located on the reverse (tails) side, just below the word "ONE." The possible marks are:No mint mark = PhiladelphiaD = DenverS = San Francisco
All High Relief Peace dollars were struck at the Philadelphia Mint, so they don't have a mintmark.
On the back of the coin, under the ONE in "ONE DOLLAR", there will be a "D" if the coin was minted in Denver and if there is no letter under there it is a Philadelphia minted coin. Your coin may have an "S" as a mintmark rather than a "D" or no mintmark, in that case your coin was minted in San Fransisco.
1928 makes it a Peace dollar. The mint mark is located on the reverse (tails) side, below the word "one." D for Denver, S is San Francisco, and no mark is Philadelphia.
No 'O' mintmarks for this series of coins, none of the Peace dollars were struck at the New Orleans Mint.