Commissioned by the SNCF starting in 1950, the Rames à Grand Parcours (RGP) trains represented a major step forward in long-distance passenger service. Equipped with MGO engines, these trains – built by De Dietrich for the engines and by Brissonneau & Lotz for the carriages – were designed to meet the needs for speed and comfort on long-distance routes. Structurally derived from the RGP 2 × 2700 and mechanically from the X 2800, the RGP I units were produced in two main versions: A carmine red/cream livery reserved for the prestigious Trans Europ Express (TEE), dedicated to first class international services Equipped with front and rear lights that automatically alternate based on the direction of travel, with the possibility of being switched independently in digital mode NEM 362 hitch at.