ADOLF LUTHER (1912-1990) Hohlspiegelobjekt signed, numbered and dated in pencil 'N 8489/ Luther/ 90', labels and stamps (on back) mixed media (concave mirror, acrylic box) 40 x 40 x 9 cm executed in 1990 Provenance: Galerie Ingrid Mensendek, Düsseldorf, Germany; Galerie Neher, Essen, Germany; Private collection ADOLF LUTHER (1912-1990) Hohlspiegelobjekt signed, numbered and dated in pencil 'N 8489/ Luther/ 90', labels and stamps (on the back) mixed media (concave mirror, acrylic box) 40 x 40 x 9 cm executed in 1990 Provenance: Galerie Ingrid Mensendek, Düsseldorf, Germany; Galerie Neher, Essen, Germany; Private collection