The Crash Cinema DVD claims it's a 1972 film, but has no other info on the packaging (probably because they couldn't find it here :-p)

highly valuable info! added movie, prod. co. (and logotized), prod., dir., writer, action dir., assist. dir., phot., mus., ed., art dir., costumes, gaffers, makeup, sound, continuity, credits designer and 15 actors!