The intrinsic value is $14.16 with silver at $18.31 per ounce
1922 silver dollar with closed eagle wings
A 1921 Half Dollar is 90% silver. It has a melt value of somewhere around $12. The related link below has more information.
there were two silver dollars struck in 1921. the Morgan dollar and the peace dollar. Send more specific info; condition might be helpful too.
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There is around .77 ounces in a 1921 US silver dollar.
Assuming it's a more common Morgan dollar, about $13 for its silver content
There's a Peace dollar but not a war dollar. Please see the Related Question.
A average Mint State 1921 Morgan is $30.00-$40.00
1921 is by far the most common date for Morgan dollars -- current value is about $17.00
Two silver dollar designs were issued in 1921. The first was the Morgan dollar which has a value of $24 to $40,000 depending upon the mint mark and the condition of the coin. The second issue was the Peace dollar and it has a value of $90 to $65,000 depending upon the condition of the coin.