A rare coin has brought a Florida couple a pretty penny.

Denis Loring and Donna Levin bought the 1792 copper penny at auction last year for $437,000. They sold it in May for $660,000.

The coin originally was owned by descendants of Oliver Wolcott, who was a signer of the Declaration of Independence and Connecticut's governor in the 1790's.

The chocolate-colored coin is one of only nine known to exist.

Dallas-based Heritage Auction Galleries arranged the sale and said the buyer, "an East Coast energy company executive," wants to remain anonymous.