The Original Six is a well-known term for the group of six teams that composed the National Hockey League ( NHL ) for the 25 seasons between the 1942-43 NHL season and the 1967 NHL Expansion . The Original Six is a term for the group of six teams that comprised the National Hockey League ( NHL ) for the 25 seasons between the 1942 â `` 43 season and the 1967 NHL Expansion .