Round lid surrounded by a square frame.
The precise location within the city is not known since geographical information was not attached to the picture,but is known to have been taken in the INNERE STADT district
The same cover without a square frame was photographed in 2022 by Eli Zvuluny at Schwarzenbergpl. 1, 1010 Wien, Austria Click for a larger image Translation of the text on the cover
GEPRUFT - checked