13. 13AR HEINZ MACK (b. 1931) Flügelobjekt 1972–1973 signed, dated 73 and inscribed II/IV cut-out metal mounted on polished steel in an artist’s frame 35 x 34.7 cm. This work is part of an edition of 100 copies numbered in Arabic numerals + 4 copies numbered in Roman numerals, all of which are different. We would like to thank the Heinz Mack Foundation for the information they have kindly provided us with regarding this work. Provenance Klaus Benden Gallery, Cologne Acquired from the gallery by the current owner Bibliography Heinz Mack, *Mack-Strukturen*, Düsseldorf 1975, p. 65 (another copy) Thomas Grochowiak, Multiples. Izložba savremene umetnosti u Saveznoj Republici Nemačkoj, Belgrade 1973, nos. 44 & 46, pp. 184–189 (another copy) Heinz Mack, Anette Kuhn, *Mack – Druckgraphik und Multiples*, Catalogue Raisonné 1957–1990 (Vol. 1), Stuttgart 1990, no. 190, illustrated in colour (another copy)