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On the cover:
FŐVAROSI CSATORNÁZÁSI MŰVEK ZRT BUDAPEST EN124 D400 EME A-1064 KS DIN 1229 2011 MPA HB HYDROTEC On the frame BETON/GUSS HYDROTEC DIN19584 D400-F900 EN124
The round part of the lid is very similar to that of the same manufacturer
The circular portion of the lid also appears separately as seen in a photo taken in 2019 by Eli Zvuluny in Budapest, Jászai Mari tér, 1137 Hungary Click for a larger image
FŐVAROSI CSATORNÁZÁSI MŰVEK TULAJDONA - Budapest Sewage Works