sentences:  The SM.78 was built between 1932 and 1935, with only 16 by SIAI and 32 from Piaggio.It equipped the 141° "Squadriglia", based at La Spezia, the 144° based at Livorno, the 182° at Nisida and the 189° at Syracuse.It continued to serve until 1938, being replaced by the CANT Z.501, a monoplane design with superior performance.