Vitesse 1:43 Saurer S4C Military Canvas Covered Truck, Gray

Adolph Saurer AG was a Swiss manufacturer of trucks and buses under the Saurer and Berna (beginning in 1929) brand names. Based in Arbon, Switzerland, the firm was active between 1903 and 1982. Their vehicles were widely used across mainland Europe, particularly in the interwar period.

In 1853 Franz Saurer (1806–1882) from Veringenstadt in Germany established an iron foundry for household goods near the Swiss town of Sankt Gallen. In 1863 he started production of Jacquard sewing machines in Arbon, from 1869 together with his sons as company associates of F. Saurer & Söhne. In 1896 his eldest surviving son Adolph Saurer (1841–1920) took over the company. He and his son Hippolyt (1878–1936) developed the enterprise as a joint-stock company.

From 1896 Saurer also manufactured petrol engines and the next year Hippolyt Saurer initiated the production of a phaeton body automobile run by a one-cylinder opposed-piston engine. In 1902 a first four-cylinder T-head engine model with touring car and sedan chassis was built.

From 1903 onwards Saurer concentrated on the production of commercial vehicles which soon gained a good reputation. The company ran subsidiary companies in Austria (1906–1959, in the end taken over by Steyr-Daimler-Puch), France (1910–1956, taken over by Unic), the United Kingdom (1927–1931, taken over by Armstrong Whitworth as Armstrong-Saurer), and in Germany (1915–1918, taken over by MAN). In Italy, the Officine Meccaniche (OM) manufacturer was for many years licensee of Saurer engines and other mechanical units, which they used in their own ranges of trucks and buses. In Poland the state-owned Państwowe Zakłady Inżynieryjne produced license-built Saurer engines (powering, among others, the 7TP and 9TP tanks) and coach chassis used in the Zawrat bus.

In the United States, the Saurer Motor Truck Company, headed by C.P. Coleman, had the rights to manufacture and sell heavy trucks under the Saurer brand name at its plant in Plainfield, New Jersey (which commenced operations in November 1911). On September 23, 1911 the Saurer Motor Truck Company merged with the Mack Brothers Motor Car Company of Allentown, Pennsylvania, headed by J. M. Mack, to form the International Motor Truck Company (IMTC). IMTC would continue to make and sell trucks using the Saurer name until 1918. In 1922 IMTC would become Mack Trucks, Inc