artist stamp in ink on reverse u.c.: PHOTOGRAPHED BY / LOPEZ-MEDINA artist stamp in ink on reverse c.: JOSE M. LOPEZ / LUIS MEDINA / 3716 N. CLARK STREET / CHICAGO, ILLINOIS stamped in ink on reverse l.c.: PLEASE CREDIT inscribed in pencil on reverse l.l.: 13 (in a circle) inscribed in pencil on reverse l.r.: LOPEZ-Medina