[Seal of Freiburg]
KANALISATION FREIBURG i. Br
PASSAVANT
KLASSE D
RAL-GZ 692 Quality Mark

on the outer ring:
BUDERUS
DIN 19584
KLASSE D
RAL-GZ 692 Quality Mark

PASSAVANT is a name used by the manufacturer ACO. To specify products related to drainage systems.

Please note that the outer ring was made by another manufacturer (BUDERUS)

The lid is similar to another manhole cover made by the same manufacturer

 

In the center of the lid, the city’s historical seal, featuring the "Water Castle" (Wasserschlössle)

The same lid, but surrounded by a square frame (this time from the same manufacturer ACO), was photographed on the same day by the same photographer at Salzstraße 32, 79098 Freiburg im Breisgau, Germany
(BEGU is a combination of concrete and metal in the lid used by the manufacturer ACO)
Click for a larger image

Translation of the text on the cover:
KANALISATION FREIBURG i. Br - Sewerage System Freiburg i. Br