Made by Costruzioni Meccaniche of Saronno, delivered with the factory number 284 to SNFT, it entered service in 1907 and almost immediately was assigned to passenger transport, which in those years grew considerably thanks to the expansion of the railway line which allowed a connection fastest among the numerous localities of our province. However our N.1 was also used, in support of other more powerful locomotives, in the transport of goods, to meet the needs of the numerous factories existing at the time in Valle Camonica (factories, woolen mills, cotton mills, foundries, quarries ....) .
Having overcome the period of the Second World War without major problems, the life of the machine and of the sisters, also of other groups, continued without particular jolts until the mid-1950s when, with the arrival of Diesel vehicles, the convoys entrusted to them decreased significantly. First relegated to less important services and then to shunting services, the provisions began at the end of 1959. The number 1 was put to rest on July 1, 1961, after having traveled like 2,500,000 kilometres.
His fate now seemed sealed, but the passion of the members of the Bresciano Railway Model Club decided otherwise, becoming promoters of an initiative considered almost impossible: saving Number 1.
It was proposed to take the mammoth machine to the Cidneo hill.
Thanks also to the availability of the political offices of the time (Mayor Bruno Boni in the lead), the project took shape and was completed in a short time. First there was the formal transfer from the SNFT to the Locomotive Club, which took place for the symbolic sum of 1 lira, after which the planning phases of its transport began and in particular the ascent to the Colle, which certainly aroused some concern.