In 1920 there were no NBA Finals. The NBA Finals officially started in 1947.
The team that won the Scottish League Cup finals of 1947 was Rangers.
The Boston Celtics have won the most NBA Finals and thus the most NBA championships with 17.
The Seattle SuperSonics won the 1978-1979 NBA finals.
The Los Angeles Lakers won the NBA Finals in 1980.
Los Angeles Lakers
The Miami Heat won the 2013 NBA finals.
Some team that played their hearts out and deserved to win the 1930's NBA finals.