This article was originally printed in Numismatic News.
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Silver swept toward $40 a troy ounce in New York trading in early April.
By the close on April 6, 1 ounce of the precious metal was $39.38, a 31-year high.
In 1980 silver traded over the $40 level for just six days.
At an even $40 an ounce, the melt value of pre-1965 U.S. dimes, quarters and half dollars is 28.6 times face value.
Gold set an all-time high of $1,458 a troy ounce by the close April 6.
This is up from $256 a troy ounce, a low point just days before the attacks on the World Trade Center Sept. 11, 2001.