The letters are mint marks and indicate where the coin was struck. The mint mark on Peace dollars is located between the word ONE and the tip of the eagle's tail feathers.
On modern coins, D = Denver, S = San Francisco, P = Philadelphia. However the P mint mark is only used on coins made at Philly since 1980, not including cents.
$27.
The only dollar coins issued in 1980 were made of cupro-nickel, not silver. They're only worth face value.
There is no 1921 barber silver dollar, it is either a peace dollar (eagle perched on a rock engraved PEACE on the reverse) or a Morgan dollar (Eagle with gothic lettering above it saying "In God we Trust" on the reverse)
Current value of the silver is $15.40. Regardless of date, all Peace dollars contain .77344oz of silver.
1922 is the most common date for Peace dollars so the value is mainly for the silver content. At present it's worth about $21. The 1923 is nearly as common, maybe worth a dollar more.
$27.
The Morgan Silver Dollar can range from $25 to $70, and the Peace Silver Dollar from $50 to $300.
It's actually called a Peace dollar. Its value is around $14 to $16 for its silver content.
The first Peace dollars were struck in 1921.
The 1924 silver dollar is called a Peace dollar because it says Peace on the side with the eagle. It is worth about $25 for the silver alone. If the condition is better, it is worth more.
Year: 1922D Mintage 15,063,000 Numismatic Value Range: $14 - $400$8.6870102468 is the total melt value for the 1921-1935 silver Peace dollar on January 16, 2009.ref:http://www.coinflation.com/coins/1921-1935-Silver-Peace-Dollar-Value.html
Each Peace dollar contains 0.77344 troy ounces of silver and is valued at $17.26 when silver is at $22.36 per ounce.
The last Peace dollar was issued in 1935 so it can't be a 1942 Peace dollar. Look at the coin again and post new question.
No US silver peace dollars were struck in 1929 or 1930.
All Peace dollars are 90% silver. The current silver value is $15.28. The collectible value depends on the the date, mintmark and condition of the coin.
There's a Peace dollar but not a war dollar. Please see the Related Question.
If silver is at a spot price of $37.90 per oz a peace dollar would have a melt value of $29.32.