Adolf Luther (Krefeld-Uerdingen 1912 – 1990 Krefeld). ”Licht und Materie”. 1968 Mirror and synthetic lenses in the acrylic glass box. 79,8 × 79,8 × 10,6 cm (31 ⅜ × 31 ⅜ × 4 ⅛ in.). On the reverse in black felt-tip pen dedicated, signed and dated: Für Bernd Peters A. Luther 68. There with a stamp in red: LUTHER LICHT u. MATERIE. [3146] Provenance: Private Collection, Bavaria