This was one of three works enlarged in Portugal by Antonio Duarte, under Gabo’s supervision, between 1963 and 1965, carved from Portugese stone selected by the artist. This model was enlarged from a small alabaster model that Gabo had made for his wife, Miriam, as a gift. The three large stone works were delivered to Gabo in America in early spring 1965, where he finished them himself. They were subsequently sent for exhibition in Europe (receipt, Cohen and Powell, 20 Jan 1965; letter M. Gabo to R. Duarte, 26 Mar 1965). According to Miriam Gabo, although the three works were entered in the catalogues for the European touring exhibition of 1965-6, they were only shown in London, at Tate.