ADOLF LUTHER (1912-1990) Licht und Materie signed, numbered and dated in pencil 'N 8464/ Luther/ 76', label and stamps (on back) mixed technique (concave mirror, acrylic box) 36 x 36 x 9 cm executed in 1976 Provenance: Galerie Neher, Essen, Germany; Private collection ADOLF LUTHER (1912-1990) Licht und Materie signed, numbered and dated in pencil 'N 8464/ Luther/ 76', label and stamps (on the back) mixed media (concave mirror, acrylic box) 36 x 36 x 9 cm executed in 1976 Provenance: Galerie Neher, Essen, Germany; Private collection