Round lid surrounded by a square frame. The lid design is similar to other caps made by other manufacturers, for example
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: Lighting Tel Aviv Jaffa municipality Kurdieh and his sons EN124 MK B125 The Standard mark of the Standards Institute of Israel IS 489 500