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On the sign:
סמל המועצה לשימור אתרי מורשת בישראל סמל העיר חולון
מגדל המים ברחוב אז"ר המגדל הוקם על ידי חברת "אגרובנק" ב-1935. שימש כמאגר מי שתייה לתושבי השכונה. בחלקו העליון הוקמה עמדת תצפית ואיתות של ה"הגנה".
The sign shape is square but its head is designed according to the silhouette of the old building of the Gymnasia Herzliya, which serves as a logo of the Council for the Preservation of Heritage Sites in Israel
The water tower was photographed the day the sign was taken, on one of the tower pillars you can see the sign Click for a larger image
Translation of the text on the sign: Symbol of the Council for the Preservation of Israeli Heritage Sites Holon city emblem Water Tower on Azar Street The tower was built by Agrobank in 1935. Used as a reservoir of drinking water for the neighborhood residents. An observation post and signal of the Haganah were established at the top.