Since the beginning of the 19th century, the Belli family from Viterbo has been dealing with the metal industry. In 1967 Angelo Belli founded the company that is considered one of the leading companies in Italy and abroad.
No colored or golden covers were found for this manufacturer, nor were any municipal emblems found.
The intended use of the cover does not appear on many covers. On some covers used for communications, the name of the communication provider is indicated (for example, Open Fiber)
. Others display the word SEMAFORI (traffic lights)
, and so on.
The production year of the cover usually does not appear.
Standards The European EN124 standard and its associated load classes appear on many covers, with the most common classes being C250 and D400
. The Italian UNI standard appears on many covers
, as do the Italian ICIM
and ICMQ
certifications.
Typical covers Many covers feature a background composed of the manufacturer’s logo
. Others feature a background made of diamond shapes
. Many covers are diagonal (square or rectangular covers composed of two triangles, with the opening performed by lifting one of the triangles)