All U.S. coins without mintmarks were struck at the Philadelphia Mint.
If you know it's a 1921 "S" Morgan you found the mint mark
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.
If it has a mintmark it's on the reverse just above the letters DO in DOLLAR.
From $1 to $20,000 depending upon the mint mark and the condition of the coin.
There is no mint mark on the 1921 Peace dollar because they were all minted in Philadelphia and thus carry no mint mark.
The letter is known as the mint-mark and tells where the coin was made. A coin having a P mint-mark (or no mint-mark on some coins) was made in Philadelphia, a coin having an S Mint-mark was minted in San Fransisco, a coin with a D mint-mark was minted in Denver.
Please re-examine what you have and post a new question. The details you provided do not correspond to any known coin: > The first Sacagawea dollars were struck in 2000. > No U.S. coin minted in 1921 has a P mint mark. The P mint mark did not appear on any denomination until WWII, and was not used on $1 coins until 1979.
Please check again and post a new question. The Carson City Mint closed in 1893.
Please check again and post a new question. The C mint mark was only used on gold coins minted from 1838 to 1861. Your coin should either have no mint mark, a D, or an S.
it can be worth 20 cents to 75 dollars depending on grade and mint mark.
$23 to $40,000 depending upon the mint mark and the condition of the coin.
The mint mark is located on the reverse [tails] side of the coin at the bottom below the wreath. If there is no mint mark then the coin was minted at the Philadelphia Mint.