1 of 2 | This 1792-dated copper cent with a tiny silver plug in its center was sold for $1,150,000 by Heritage Auctions on April 19, 2012. The experimental penny was one of the first coins ever struck by the United States Mint in Philadelphia. Photo credit: Heritage Auctions
"There are only 14 known surviving silver-center cents, and this is the third-finest known. In 1974, this same coin sold for $105,000, and now it brought $1.15 million," said Todd Imhof, executive vice president of Heritage Auctions.
"Some 1792-dated cents have a silver plug as a proposed way to overcome a flaw in the Mint Act of 1792. That congressional law would have made pennies of the era too large and heavy for practical use. So the mint's chief coiner suggested making a smaller sized coin using a tiny silver plug with three-fourths of a cent worth of silver and a quarter-cent's worth copper surrounding it," Imhof said.
