Hana Gasic's postcard of two girls

Two unknown women are pictured here. The picture was taken in a studio and a letter composed in Ladino was written on the other side and dated November 11, 1919 in Sarajevo. The letter is postmarked Sarajevo as well. The letter is addressed to Isidor Montiljo but the greeting is to an Isak. My father did have a brother Isak Montijo so maybe it was addressed to him.