3 different Commemorative half's and 1 Walking Liberty half ( one from each mint ) were coined that year and all are dated 1921. Which one are you asking about? Post new question.
There are no U.S. notes with the series date of 1921
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twenty one dollars
50$
A US half dollar with a date of 1979 is a Kennedy half dollar not a liberty half dollar. The coin has no silver and is only face value.
It has a metal value of about $10.
Value is for the silver about $2.50
a half dollar
About $4-5
50 cents.
The US didn't strike any half dollars in 1804.
A U.S. half dollar dated 1953 or 1952 is a Franklin half dollar. If it shows any wear, the value is only for the silver, about $10.00. The coins are very common.