There are two main types of bells: the one made with bronze and the one made with iron. The bells in bronze are cast in mold sand their shapes look like church bells, while the iron bells are made from a steel sheet and are rounder.
Some bells are made in great numbers by factories, while others are made by small artisans. Usually, every makers print their mark on each piece they make, this is what we call the “brand of the bell”. Some brand are rarer than other and are not made anymore, therefore when the bells are of high quality, they become a collector’s item.