Inscription
lower left in graphite: OKTP; lower right in graphite: C Ofili 08; lower center verso in graphite by unknown hand: cerulean 100%; lower right verso in graphite by unknown hand: Ofili: Rainbow-Blue Friends OKTP
lower left in graphite: OKTP; lower right in graphite: C Ofili 08; lower center verso in graphite by unknown hand: cerulean 100%; lower right verso in graphite by unknown hand: Ofili: Rainbow-Blue Friends OKTP