Another strange Swiss pressing

Hi all.  We are spezialised in Swiss vinyl records. We have just another one very rare pressing. It is called Zweites Programm and released by 'Quartett Johannes Kobelt' . This is a group of four musicians: guitar, cello, violin, horns and many more, playing acoustic music of different kinds: Jazz traditional style, Swiss Volksmusik, Classical music and also Russian and Gipsy tunes. The four members play technically very well, with a lot of heartful sounds. This record was released in 1973. That was a time when many musicians trying to do recordings. Some were not always good music, but for commercial success, other better musically, but she wanted to hear any ... This group belongs to the second. Has anyone heard of these musicians? Thanks columbia.sax.