If I had to take a guess at what the most recognizable logos in hockey are, I'd say it's the original 6. Other than a few slight modifications, these logos have stayed the same for a long time. It's interesting how the expansion era teams have gone through so many more major logo/jersey changes in just under 40 years than the original 6 have over their entire existance (other than those 1910-1930 jerseys, which where... different).