A Montreal-based auction house says it's received a certificate from the Guinness World Records about the jersey Henderson was wearing when he scored the winning goal in the 1972 Summit Series against the Soviets.
Classic Auctions says it has been informed that Guinness classified it as the most expensive hockey jersey ever sold at auction.
The winning bid came in at $1.275 million, two years ago.
Marc Juteau, president of Classic Auctions, says he believes the jersey might actually be the most expensive ever auctioned off, in any sport — putting Henderson atop an even more illustrious category, beyond hockey greats.
But he says Guinness listed the item in a special hockey category as a matter of caution, to ensure accuracy.
"It's the most expensive jersey ever sold at an auction, in any sport, based on what we've heard," Juteau said in an interview Friday. "The Guinness World Records people simply decided to put it in the hockey category because they didn't have the data for other sports."
The famous No. 19 jersey was sold to Toronto real-estate magnate Mitchell Goldhar.
Henderson's tie-breaking goal came in the last minute of the eighth and final game. Canada won the series 4-3, with one tie.