1972 Canada Russia Summit Series Game 1 Used Hockey Puck Scarce Slug Montreal1972 Canada Russia Summit Series Game 1 Used Hockey Puck Scarce Montreal Scarce "Hockey Canada" rubber crested puck saw action in the historic 1972 Canada Russia Summit Series Blank back slug with raised " Made in Canada", the trademark of the Biltrite company identified s a B1 slug. The puck made for the four Summit Series games taking place on Canadian soil re difficult to locate, with any and all surfacing examples highly coveted as only 50 pucks