Actually I do not know which types of locomotives are there. Fondazione FS Italiane was born last year and now in Italy there are a quite confused situation about historical materials.
Probably in Pistoia there is the 741.120 Franco Crosti steam locomotive.
It is the only working Franco-Crosti steam locomotive and it was made from a 740 locomotive modified with Franco-Crosti pre-heating system.
The 740 group has been one of the most popular. These locomotives hauled every type of train, even though they were designed specifically for freight and local trains.
I know that in Italy 400 locomotives built by Alco arrived in the span of time between the 1917 and 1922. They were registered in italy like group 735. Nowadays two pieces are saved, one is in Museo Nazionale di Pietrarsa (near Naples) and the other is in bad conditions in Museo Ferroviario Piemontese (near Turin). Both two locomotives are not working.