SNCF Class BB 10003 locomotive was used as a test machine for operations of the TGV-TMST on 750 V and 3000 V. In 1998 the locomotive was converted back to a non-experimental class - as SNCF BB 15007. (SNCF Class BB 15000) The results were not as good as synchronous motor technology; it was not until the introduction of GTO transistor technology that series production of an asynchronous induction motored locomotive began in France, as the "Eurostar" TGV (1992), and later the BB 36000 "Astride" (1996). SNCF Class BB 10003 The locomotive SNCF BB 10003 was an experimental prototype locomotive converted from a SNCF
Argentine State Railway companies in the country, operating a railway network of 6,617 km. By 1936 the railway network had been extended to 9,690 km. Most of the railway lines built by the Argentine state were metre gauge because of financial reasons. In 1937 the State company began to acquire some existing companies with the purpose of competing against British railway companies. In 1948 Argentine State Company (along with British and French companies) became part of Ferrocarriles Argentinos after nationalisation of the railway network, headed by then-President Juan Domingo Perón. Therefore, the Central Northern rail lines were added to General Belgrano Railway network