A dime made in 1873 sold for $1.6 million at auction.

An anonymous bidder won the pristine coin, said Chris Napolitano, president of Stack's Bowers Galleries, which auctioned it during an American Numismatic Association convention. With a 15 percent buyer's fee tacked on, the final price for the coin was $1.84 million, he said.

The rare coin was minted in Carson City, Nevada, during a one-day run of dimes.