An M.20 on display at the Gianni Caproni Museum of Aeronautics in Trento, Italy, is as of 2012 the oldest surviving example of an original Macchi-designed aircraft in Italy. Probably built sometime between 1920 and 1925, it subsequently was modified with the new wings and ailerons introduced in 1925. The Società Anonima Aerocentro Emiliano purchased it in 1929, installed a Salmson 9 AD engine in it, and in March 1930 registered it as I-AABO. The Aero Club of Rimini purchased it in September 1933, and subsequently it was written off after an accident. The Milanese aeronautical engineer and aircraft manufacturer Piero Magni purchased it, and in 1939 he modified it, giving it rounded and elongated wing tips, enlarged cockpits, and different fletchings, but in its modified form it did not receive a certificate of airworthiness.
