inscribed in fibre-tipped pen on reverse u.c.: (upward arrow) / (…illeg.) / 2013 inscribed in fibre-tipped pen on reverse u.c.l.: RAAFAT ISHAK / HALF A PROPOSITION FOR A BANNER / MARCH AND A BLACK CUBE HOT AIR / BALLOON. NO. 4 / ACRYLIC 2013 inscribed in fibre-tipped pen on reverse l.c.: 4 (in a circle)