The first dozen seasons (1967–68 through 1978–79) of the Expansion Era saw continued dominance by Original Six teams, including the Bobby Orr-led Bruins of the early 1970s and the Canadiens dynasty at the end of that decade. Expansion teams, by comparison, were not as dominant during that same time period, which can be partly attributed to expansion teams in general being weaker than existing clubs when first starting out. During those dozen seasons, only one expansion team hoisted the Cup (the Philadelphia Flyers, in 1974 and 1975), and only one Stanley Cup Finals series featured two expansion teams (the Flyers' 1975 win over the Buffalo Sabres). By the early 1980s – after further expansion, a merger with the WHA, and changes in conference/division alignment and playoff structure – expansion teams began reaching clear parity with the Original Six. Indeed, the 1979 Stanley Cup Finals between the Canadiens and Rangers would be the last Final featuring any Original Six team until 1986 (when the Canadiens claimed the Cup) as well as the last all-Original Six Final until Chicago's win over Boston in 2013. That same year, all six Original Six teams made the playoffs for the first time since 1996. Since the dawn of the Expansion Era, every Original Six team has won the Cup at least once except for Toronto, which has the longest active Cup drought in the NHL.