They were created in the ancient foundry “G.B. Mazzola e Figli” of Valduggia (Valsesia).
150 years ago, in May 1870, three other smaller bells were added.
In 1922, all the bells were replaced by larger ones. In 1925, the "ancient" bells were moved to the bell tower of the new Salesian church of Gesù Adolescente in Borgo San Paolo in Turin. Here, it is still operational.
Source: The Salesian Bulletin