Certificate of authenticity and provenance by Nikol Art, with archive no. MMTB/14NB/OP/1070
Fire stamp of Nikol Art on the reverse. Bibliography: "La Dinamica dell'oggetto visivo", Allemandi Editore, p.163; DOMUS 533, April 1974.
Hemispherical structure in multilayer wood with interlocking orthogonal planes, all fourteen painted in black and white.
First of the two works realized to study the alternation of black and white in a hanging structure.
Prototype created by Massironi for Nikol.
Provenance: Nikol Art, Padova; acquired from the artist in 1970