The manufacturer’s covers are made of metal and concrete
or of metal and a transparent material
, and their shape is circular
, rectangular
, or square
.
No painted or gilded covers have been found for this manufacturer. City emblems also do not appear on the manufacturer’s covers.
Since some of the covers are Coal holes
(covers from the period when homes were heated with coal, into which sacks of coal were poured so that the coal carriers did not have to enter the houses), it is clear that some of the covers were intended for heating purposes.
The year of manufacture of the cover usually does not appear.
Standards No standard marks have been found on this manufacturer’s covers.
Typical covers Two main types of covers appear on the site: Coal holes
and covers with a transparent section (a feature characteristic of many of the company’s covers), allowing light to pass through and illuminate the basements below