Round lid surrounded by a square frame.
The gilded interior is less fit to withstand loads than the non-gilded version, as shown in the listed numbers (5 ton vs. 8 ton)
There is an identical but not gilded version Click for cover's details Translation of the text on the cover
Department of Light
The emblem of the city of Ramat Gan
The Standard mark of the Standards Institute of Israel 400 5T