The 1966 NBA World Championship Series was the championship round of the 1966 NBA playoffs, which concluded the National Basketball Association (NBA)'s 1965–66 season. The Eastern Division champion Boston Celtics faced the Western Division champion Los Angeles Lakers in a best-of-seven series that the Celtics won four games to three. For the Celtics this was their tenth straight finals appearance, which tied a North American professional sports record set by the NHL's Montreal Canadiens from 1951 to 1960. Won the 1966 NBA Finals on April 28, 1966. Wiki link