Peter, Sue, & Marc - "Légende de mon pays" (Music video from RTVE; 1971; Withdrawn Swiss ESC entry)

In 1971, the trio, Peter, Sue, and Marc, were internally selected to represent Switzerland in the Eurovision Song Contest in Dublin. They were set to perform with the song "Légende de mon pays".
However, for unknown reasons, later Swiss newspapers recognized their song as "Les Illusions de nos vingt ans," a completely different song that was later performed in Dublin. The song placed 12th in a field of 18 countries.
Peter, Sue, and Marc eventually participated in the 1976, 1979, and 1981 editions of the Eurovision Song Contest, making them one of the most frequent participants to be main singers with 4 participations.
This music video comes from this long video from Spanish archives which shows most of the participants singing songs and being interviewed. This clip can be seen in the 1:01:51 mark. • TVE. 1971. Radiografía...