Adolf Luther (Krefeld-Uerdingen 1912 – 1990 Krefeld). Standing lense. 1989 Semi-transparent concave mirror, glass, plastic frame, metal stick on plinth. 250 × 76 × 62 cm (98 ⅜ × 29 ⅞ × 24 ⅜ in.). Signed and dated (incised) on the plastic fixing: Luther 89. [3374] Provenance: Private Collection, Rhineland