In the huge covered roundhouse (Rotonde) in Chambéry with a diameter of 108 meters, which is used for the maintenance and storage of SNCF locomotives and railcars, there are four tracks for historic locomotives of the l'Association pour la Préservation du Patrimoine Ferroviaire Savoyard (APMFS). The CC 6500 was a French electric locomotive series for use on the DC network of the French state railroad SNCF. When they entered service in 1969, the locomotives, which were approved for a maximum speed of 200 km/h (160 km/h for the "Maurienne" series), were the most powerful SNCF locomotives with 5900 kW. The 21 green-painted locomotives # 6539 to # 6559 came to the Ligne de la Maurienne (Mont Cenis) from April 1971 to December 1972, and were fitted with contact shoes for use on the side conductor rails that existed there until 1976. Locomotive CC # 6558 was withdrawn by the SNCF in june 2007, after 5'772'878 km driven, and is again operational and maintained and operated by the APMFS (Association pour la Préservation du Matériel Ferroviaire Savoyard).
