Inscription
lower left in graphite: O.K.T.P.; lower right in graphite: Ed Ruscha 2006; in unknown hand, lower right verso in graphite: Ruscha: Desert Gravure OKTP
lower left in graphite: O.K.T.P.; lower right in graphite: Ed Ruscha 2006; in unknown hand, lower right verso in graphite: Ruscha: Desert Gravure OKTP