Antonio Calderara, ”Attrazione quadrata in dimensione rettangolare 1965 Monogrammed and dated at the left outer edge at the bottom in black ballpoint pen: A. C. 1965. On the reverse on a printed label of the artist inscribed with the work number, titled, dated (differing) and inscribed with the dimensions in black ballpoint pen: MG 25 33, Attrazione quadrata in dimensione rettangolare, 1966, 36 _ 18. Beside this to the right a label of the Galleria Milano, Milan 18 × 35,5 cm Oil on panel Private Collection, Sweden