In July 1919: Osvaldo Fresedo and Pedro Maffia (bandoneons), Juan Koller and Julio De Caro (violins), José María Rizzuti (piano) and Hugo Ricardo Baralis, father of the violinist (double bass). Sometimes the violinist Rafael Rinaldi. When Fresedo traveled to the United States with Tito Roccatagliata and Enrique Delfino, the bandoneon player Pedro Polito replaced him as leader. In 1922: Fresedo and Alberto Rodríguez (b), Roccatagliatta and Roberto Zerrillo, later Manlio Francia (v), Juan Carlos Cobián (p) and Leopoldo Thompson (db). In 1923, summer season in Mar del Plata: Fresedo and Rodríguez (b), Francia and Koller (v), Rizzuti (p), Carmelo Mutarelli (db).