This is an authentic hand signed photo by cuban national hero Jose Marti. This extremely rare photo was signed by Jose Marti while in prison at the age of 17 years. Marti dedicated the photo to a friend named Mariano , he wrote on the back of the photo : " A Mariano , Tu hermano en dolores , 28 de Agosto de 1870 " . Photo measures 2.5 x 4.3 inches. Photo was taken by the famous cuban photographer Alejandro Cohner. Only 2 Jose Marti signed photos while in Prison are known to exist .