The original version of the Cant 22, with three Asso 200 engines.

In 1928 SISA took delivery of I-AABN, its first example of the three-engined CANT 22, powered by a trio of 200 h.p. Isotta-Fraschini Asso 200 six-cylinder inline engines in tractor configuration. Named San Marco in SISA service, I-AABN was later absorbed into the state-owned Societa Aerea Mediterranea and ultimately, Ala Littoria.

CANT 22 I-ALFA (c/n 230) was named San Sergio in SISA service and joined the company in June 1931. An unequal-span biplane with a single-step wooden hull and single fin and rudder, the type was fitted with two side-by-side cockpits situated midway between the wings and the bow.

The Cant 22R.1 San Sergio at Monfalcone.

The Cant 22R.1 I-AACK San Sergio

The passenger cabin was aft of the cockpits and incorporated three large rectangular windows in each side. The CANT 22 was comfortable and operated on SISA’s Trieste-Genoa and Trieste-Ancona routes.