Columbia Pictures had an 8mm home movie division during the 1960s and 1970s. They only released silent films during the 60s, but when Super 8 sound projectors came out in the early 70s, they started putting out their previously-released silent films with sound. This was the first of a series of Flintstones films - they originally subtitled this release and put this out as a test with sound in 1973. They merely grabbed the print they used to make the silent editions with subtitles and re-issued it with the soundtrack still intact, but no subtitles. Subsequent sound releases were much better edited, but this one in its sound version is a total mess.
