PASSAVANT is a name used by the manufacturer ACO. To specify products related to drainage systems. BEGU is a combination of concrete and metal in the lid used by the ACO manufacturer
Photographer’s Note: Photographer’s note: On the Alter Markt (old Market) is a number of manhole covers showing this picture of the medieval town hall, which was destroyed and lost in WWII.
Translation of the text on the cover: CITY OF DORTMUND