A twenty-four-seat passenger transport powered by three 559kW Alfa-Romeo 126RC.34 radial engines. The S.M.75 prototype flew in November 1937. Production for military and civil use continued until 1943, 90 machines being delivered to the Italian authorities and five exported to Hungary. The latter were finally converted for military use with dorsal and ventral gun turrets. A number of Italian S.M.75s were also militarised.