Description:Significant December 31, 1972 Miami Dolphins vs. Pittsburgh Steelers AFC Championship Game ball. Wilson Pete Rozelle Official NFL football bearing period marker "Dec. 31-72 Pgh. 17 Miami 21" notation on side panel. Miami was en route to a Super Bowl victory after putting up a 14-0 regular season and defeating Cleveland in the Divisional Playoff Game played the week before. It remains the only perfect season culminating in a Super Bowl victory in NFL history. Touch of light evident use/wear. Includes letter of provenance from the Cupon Family: EX