The bus used bodies from SIAI-Marchetti from 1950 to 1951 (19 units), Macchi-Baratelli from 1952 to 1953 (30 units) and Macchi and Caproni from 1952 to 1958 (78 units).

The bus was made in two sizes, 12 or 22 meters long and had 3 or 5 axles. The gas engine is 12,517 cc (12.517 L) with 140 hp at 1700 rpm or 163 hp at 2000 rpm.

The single version had 32 seats and the articulated version 46. The larger configuration can transport 150 people.

• Azienda Tranvie ed Autobus del Comune di Roma (ATAC), Rome
• ATM, Milan

• List of buses