Keywords: Austria Levant 1890 Sc23.jpg en Postage stamp of the Austro-Hungarian Empire for usage by Levant post offices 1 Piaster on 10 Kreuzer blue used in Constantinopel Catalogue Sc 23 Mi 23 Valid for postage to 30 9 1900 1890 Scan of original Austro-Hungarian postal authorities PD-old 1890 stamps Austrian post offices in the Ottoman Empire Ultramarine stamps |