Here's what I think: her tits look a lot like modern day implant titties. They stick out when she lays on her back, they don't fold over themselves, and sometimes they don't move like the fat in real titties. But then again, sometimes they do! If her movies were made in 2007, I'd definitely say they were fake, but they're from the 70's, which makes me think they were real.
What I've concluded is that her left one is real, and her right one is fake, because it doesn't move as naturally as the other. I would really like to believe that they are both authentic, (it, uh, helps me when I'm masturbating), but I'm having a hard time with this one. Any insights from you guys out there?