Diesel locomotive were classified as DET 1 and DET 2 (). Due to shortage of petrol products during World War I, they remained unused for regular service in Germany. In 1922, they were sold to Swiss Compagnie du Chemin de fer Régional du Val-de-Travers (), where they were used in regular service up to the electrification of the line in 1944. Afterwards, the company kept them in service as boosters till 1965. Fiat claims a first Italian diesel–electric locomotive built in 1922, but little detail is available. A Fiat-TIBB diesel–locomotive "A", of 440CV, is reported to have entered service on the Ferrovie
TU10 diesel locomotive 2010 to St Petersburg. Most of the locomotives were painted in a variation to a common RŽD livery in the Russian national colours, with the exception of TU10-002 of Nowomoskowsk. So far 30 pieces of ТУ10 have been built (as of June 2015). The TU10 diesel locomotives are currently being used at the following railways: TU10 diesel locomotive The locomotives TU10 (Russian TУ10) of the Russian Railways (RŽD) are narrow gauge diesel locomotives for children's railways. The children's railways or pioneer railways were used for extracurricular education, where adolescents learned railway professions. This phenomenon originated in the USSR and was