They usually come in pairs so their shape is rectangular.
A single occurrence of this cover was photographed in 2018 at 1 Safad Street, Tel Aviv-Jaffa, Israel Click for a larger image
Is very similar to another cover by the same manufacturer before the Bezeq era Click for cover's details Translation of the text on the cover
Bezeq - The Israel Telecommunication Corp. Ltd.
Vulcan Foundries 770