Bills don't have mint marks. The U.S. Mint only makes coins.
Bills are printed by the Bureau of Engraving and Printing, which has only 2 facilities. The main plant in Washington DC doesn't put any special designation on its bills. The auxiliary facility in Fort Worth marks its bills with a tiny "FW" next to one of the plate designators. It may be in different places on different bills so you have to look closely for it.
There is no mint mark on the 1921 Peace dollar because they were all minted in Philadelphia and thus carry no mint mark.
The mint mark on any Morgan dollar is on the reverse above the letters DO in dollar.
Mint marks were placed in different locations on each different coin series.
No mint mark means the coin was minted in Philadelphia.
By the mint mark on the reverse of the coin, but silver dollar coins with no mint mark are made in Philadelphia
There are no mintmarks on 2 dollar bills. Mintmarks are only used on coins.
There is no mint mark on the 1921 Peace dollar because they were all minted in Philadelphia and thus carry no mint mark.
The mint mark on any Morgan dollar is on the reverse above the letters DO in dollar.
The first Half dollar with any mint mark was from the New Orleans Mint in 1838.The mint mark is on the reverse under the eagle
No mint mark means it was minted in Philadelphia.
Mint marks were placed in different locations on each different coin series.
The mint mark is on the reverse of the coin between the tail and the D in the word dollar.
No mint mark means the coin was minted in Philadelphia.
It can't be a coin and bill at the same time.
If there's no mint mark, then it was minted in Philadelphia.
No mint mark indicates that it was made in Philadelphia.
By the mint mark on the reverse of the coin, but silver dollar coins with no mint mark are made in Philadelphia