Mid Century Modern Bertha Schaeffer Sofa for Singer & Sons Loveseat. Rare solid walnut frame sofa with brass wire inset arm panels designed by Bertha Schaefer for Singer & Sons around 1954. Part of the critically acclaimed Singer & Sons collection with other esteemed designers including Gio Ponti, Carlo Molino, Carlo di Carli & Ico Parisi, this fantasically designed sofa has some great lines and interesting use of material on the arms. There is no makers mark on the loveseat.