towne32 said:

And I don't think its strange to also try to learn more about the mysterious history of the film. It's real, of course! And from 1971! But some accounts suggest there may or may not have been yet other versions.

This I totally get.

Maybe it's me but it seems there are some folks who aren't happy with any answer given, even though it's not the fault of the folks providing what info there is, but more a problem with the history of the myth/urban legend of this film and it's journey.