Round lid surrounded by a square frame. Very similar cover of the same manufacturer but in another city Click for cover's details
The same cap was photographed at 2015 at 55 Weizmann St., Tel Aviv-Jaffa, Israel, but the symbol of the city was placed upside down Click for a larger image
Translation of the text on the cover: Rokach Yosef & Sons Ltd. Registered sample No. 49756/7 The emblem of the city of Tel Aviv - Jaffa Lighting HJX-SII B125 / 500 EN-124 ROKACH CHINA IS 489 On the frame: R8500