A rare Lincoln coin from 1943 is being auctioned off decades after a Massachusetts teenager received change after buying a school lunch and realized he had struck ‘gold’.

Coin collector Don Lutes Jr. was only 16 years-old when he received the coin as change while buying a school lunch in 1947. The coin is incredibly valuable because it is one of only about 20 to be pressed using bronze instead of the steel amid World War II shortages.

At the time that Don found the coin, there were rumors going around among collectors that Henry Ford was offering to trade a new car for one of the rare “copper” pennies struck in 1943. However, after contacting the Ford Motor Company and learning that this was just an urban myth, Don decided to keep the coin. He went on to have it authenticated in 1958 by expert Walter Breen during a New England Numismatic Association convention in Worcester.

After Don’s death in September of last year, the coin was given to Heritage Auctions, which is now auctioning it off.

“While a number of other examples have surfaced over the years, no other specimen has been celebrated and written about as much as this remarkable coin,” the auction group said. “This piece inspires a special pride of ownership not equaled by any other example. This lot represents a true ‘once in a lifetime’ opportunity.”

The opening bid for the coin is $100,000, but it could end up selling for far more than that. In 2010, a bronze penny from 1943 sold for a whopping $1.7 million!