Dozens of rare Nintendo cartridges discovered in storage box

A storage box in Wisconsin turned up nearly 100 rare Nintendo cartridges, including a previously unknown version of Super Mario Bros. and Duck Hunt.

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Rare Nintendo cartridges that could be worth millions discovered in storage box

A storage box turned up nearly 100 rare Nintendo cartridges, including a previously unknown version of Super Mario Bros. and Duck Hunt.

WAUKESHA, Wis. —

A box of old Nintendo games found in Wisconsin turned out to contain nearly 100 copies of a previously unknown version of Super Mario Bros. and Duck Hunt.

The owner of OneStopWonders, a collectibles shop in Waukesha, Wisconsin, said the person who sold the box claimed Nintendo had sold the cartridges to a metal recovery service to be melted down for gold, but they were never destroyed.

“These were printed about two years after the last known printing of these games. So no one understands fully why Nintendo made a box of 100 of these,” Jason Ganos of Nintendo Wire said.

“The back sticker on the cartridge is different. The screws are different. The manual is different. Even the motherboard for the game is different. So this is one of the most-documented games in the history of video game preservation, and nobody has seen these specific carts before,” Ganos said.

Some of the cartridges are in perfect condition and have earned the world’s first PSA 10 grade for an NES game, the highest rating possible on the Professional Sports Authenticator scale.

Three of the cartridges are set to hit the auction block this month and could fetch millions of dollars.