The work is made with lost wax casting, at Tane Oficinas Ejecutivas, Polanco, Mexico, in 11 copies with Arabic numerals + artist's proofs. The multiple is taken from the work Sfera, in bronze.
Signature, date and edition at the base. Copy 4/11. The work is registered at the Archive of the Arnaldo Pomodoro Foundation, Milan, with no. M/78-80/1 and included in the Catalogue Raisonné online - multiples section, with the number M88.
Certificate of archiving Arnaldo Pomodoro Foundation.
Exhibitions: 1979, "Arte Objeto. 20 Esculturas en Plata", November - December, Museo de Arte Moderno, Bosque de Chapultepec, Mexico City (repr. in cat.)
Bibliography: 1990, "Elle Decor", Milan, February, pp. 24, 26, A house all books for Inge.