signed and dated 'Bernard Aubertin 1969' on the reverse nails and acrylic on wood 49.5 x 49.5 cm (19 1/2 x 19 1/2 in.) Executed in 1969, this work is accompanied by a certificate of authenticity provided by the Archivio Opere Bernard Aubertin and is registered under the archive number TCLR96-100075423.