These pucks were used during the 1973-74 NHL season in games played by Tony Esposito for the Chicago Black Hawks.  Tony Esposito played in 70 regular season games that year, going 34-14-21, with a 2.04 GAA average and 10 shutouts. In the playoffs, Esposito went 6-4, with a 2.88 GAA and 2 shutouts.  At the end of the regular season, the Hawks and Philadelphia Flyers finished tied with the  fewest goals against, meaning for the only time in the history of the award the Vezina Trophy was shared between goalies from different teams.  Bernie Parent and Esposito shared the award, this being Tony O's third and final Vezina of his career.