Thank you MartinRyan for the links which look interesting and I shall explore them more later. My wife has listened to the soundfragment and below I post the words she managed to catch from the song -in case it jogs anyone's memory -but we can't make proper sense of the third line. Any ideas? Could Selempino be a place name? Google produces nothing for me.

Selempino Selempino
Selempino Selempino
Cuando venga la versión adelante el batallón
Selempino Selempino
Selempino Selempino
Selempino Selempino