© Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn Wirtschaftswert Schultafel (Economic Value Blackboard) Joseph Beuys On View Accession Date: 05/01/06 Accession Number: F-BEUYS-106.444 1982 school blackboard, inscribed 7 1/4 x 10 x 1/4 in. (18.42 x 25.4 x 0.64 cm)