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
Diesel Locomotive Factory, Marhowra in JV company subject to a maximum of . The estimated cost of 1000 locomotives will be around . General Electric will maintain the locomotives for 13 years, after which the Indian Railways will take over maintenance. There will be two types of diesel electric locos – 700 WDG 4G locos of 4,500 horsepower (HP) and 300 WDG 6 locos of 6,000 HP. Diesel Locomotive Factory, Marhowra The Diesel Locomotive Factory, Marhaura is a joint venture of GE Global Sourcing India Pvt. Limited of the US with Indian Railways for the production of 1000 high-power freight locomotives over a period