The early Macchi flying boats were inspired on a captured Austrian Lohner L. The M.3 of 1916 was successful and the Italian navy used it in every role. After WWI, two M.3s were used by Ad Astra Aero for sightseeing and charter flights, with two passengers riding in front of the pilot. CH-15, painted red, is seen over Zürich. The Zürichhorn seaplane station is just outside the photo on the right side. Photo dated 1919 by the source but CH-15 was not registered until December 1919. Photo by: Walter Mittelholzer / ETH-Bibliothek Zürich