Walter Boeykens (Clarinet) Viola – Atar Arad Violin – Agustin Leon Ara, Andrzej Siwy Violone – Edmond Baert
Walter Boeykens (Clarinet) Viola – Thérèse-Marie Gilissen Violin – Agustin Leon Ara, Andrzej Siwy Violone – Edmond Baert