Round lid surrounded by a square frame.
In the next picture from the gallery you can see what is under the lid Click for item in Gallery Translation of the text on the cover
Tel Aviv Jaffa municipality
Standard mark of the Standards Institute of Israel - IS 489
An old symbol of the Tel Aviv Municipality
2011 IS 489
Gelem Concrete Products Ltd. / Patent Pending / 170479 / www.gelem.co.il