Round lid surrounded by a square frame.
The lid is similar to another cover made by the same manufacturer Click for cover's details
If you know the meaning of the following symbol Click for a larger image
(which is likely related to the load or standard of the lid), click on the question mark Translation of the text on the cover
The HaGihon is at your service
HaGihon - Jerusalem water and sewage plants
Standard mark of the Standards Institute of Israel