20pa/5h+20pa/5h Austrian Levant stationary double post card canc. "CONSTANTINOPEL 1 DEUTSCHE POST*30/4/91", arr. "LIEGE*3.MAI.1891". Reponse mailed from Belgium, canc. "LIEGE*4.MAI.1891", arr. "CONSTANTINOPEL 1 DEUTSCHE POST*8/5/91" (German post office). Rare.