I can't remember if there was a 3rd premiere or not. But I'm pretty sure that if there was, it would have shown the fifth and final Punography film $1.98 - A Spaced Odyssey.

OK. The invitation that Eddy sent shows that there was a premiere on August 15 for $1.98 A Spaced Odyssey. I am assuming the year was 1969 but need more informaiton as I still don't remember this premiere.