The lid is located on the Jaffa promenade in a place that symbolizes the location of the walls of Old Jaffa (in the 19th century).
The numbers on the lid may indicate the distance from the beginning and end of the wall.
In the next picture you can see how the lid fits on the promenade Click for a larger image Translation of the text on the cover
The wall of the sea
Tel Aviv Jaffa municipality
The emblem (new) of the city of Tel Aviv
Atarim - Tourist sites Development Company