Au rendez-vous de la mort joyeuse

I saw this movie in its German version on TV when I was about 19 yrs old. The time to watch a movie (which you do not know absolutely), especially a horror movie, was optimal - as it was late at night. I did not have any idea that the TV broadcast such a disturbing film ever and expected just any entertainment but... Goodness, I was shaken with horror and probably did hardly sleep that night, at least left the lights on to have a short nap. This movie may prove slow and yet inflicts the deepest surprise with horror far beyond the Hollywood makings. It is a genius film, absolutely underestimated and obviously hard to get or even see. Since 30 (!!!) years I have tried to get hold of it since but did not succeed. Worth watching absolutely!