Only a 6.9 rating?

I don't think it deserved that much to be honest.

If IMDB was around in 1966 it would have a much higher rating.

Only 19 thousand people have rated it and all these ratings have come over 3 decades since the films release. Naturally it's not a fair representation of the films quality. IMDB is pretty damn useless when you think about it. Especially for older films with not many ratings.