The manufacturer’s covers are made of metal

 

and come in rectangular

 

, circular

 

, or square

 

shapes.
There is also a cover by this manufacturer with a shape close to a triangle

 

.

No colored or gilded covers by this manufacturer have been found.
City emblems also do not appear on the manufacturer’s covers.

Usually, the cover’s purpose is not indicated on it, although in some cases it can be determined either by the shape of the cover (drainage

 

) or by the inscription on it (for example, SV - sluice valve

 

).

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

Standards
No standard marks were found on the manufacturer’s covers.

Typical Covers
Most of the manufacturer’s covers feature backgrounds with geometric patterns (short lines

 

, short polygons

 

, raised squares

 

, etc.).
Many covers are diagonal - square or rectangular covers composed of two triangles, where the opening is done by lifting one of the triangles

 

. There are 10 manhole covers in the site that are made by the Manufacturer
Click for the 10 covers made by Dudley & Dowell (Of these, 0 are best covers)