The manufacturer’s covers are made of metal

 

, or concrete surrounded by a metal frame

 

.
The shapes of the covers are round

 

or square

 

.
Round covers intended for sidewalks are usually set within a square frame to facilitate paving work

 

. This design characterizes a significant portion of the square covers made by this manufacturer.

No colored or gilded covers have been found from this manufacturer.
City emblems or those of the consumers appear on a significant number of the covers

 

.
The cover’s designation is usually determined by the name of the consumer

 

.
The year of manufacture typically does not appear on the cover.

Standards
The European standard EN124 and its associated load classes appear on many covers, with the most common load classes being E600 and D400

 

.
The German MPA standard appears on some covers

 

, as does the German DIN standard (for example, DIN 19584

 

).

Typical Covers
Many of the manufacturer’s covers are characterized by an outer ring with a gear-like shape and typically feature the consumer’s emblem in the center

 

, or no emblem at all

 

. There are 14 manhole covers in the site that are made by the Manufacturer
Click for the 14 covers made by Buderus (Of these, 2 are best covers)