Lucio Fontana (1899-1968), Concetto spaziale. Photo: Christie's Images Ltd., 2011 signed and dated 'l. Fontana 54' (lower right); signed and dated 'l. Fontana 54' (on the reverse), oil and coloured glass stones on canvas , 39 3/8 x 27 5/8in. (100 x 70cm.)....