Sadly no c/n or MM known. The Italian Air Force Museum at Vigna di Valle acquired this landplane I-GTAB in May 2007. It is now marked with the registration FIR-9, appropriate to a Ca.100 serving at the Florence basic Flying School in the mid-1930s. (source wiki).

Nicknamed the 'Caproncino', the Ca.100 was a derivative of the D.H. 60 Cirrus Moth. Caproni and four other factories delivered 675 production aircraft as trainers to the Regia Aeronautica. The museum acquired this one in 2007 and displays it in the mid-1930s colours of the basic flying school in Florence.