SACM delivered a test locomotive with the number 242 AE 1, which was similar in design to the 242 BE 1. It also stood on two chassis that were closely coupled to each other, each consisting of two powered axles and a two-axle lead bogie. Like the BE 1, the AE 1 also got single-axle drive with fully sprung engines. The special feature here was that the bogies had a different version of the quill drive. While one had a Westinghouse quill drive, the other got a special drive developed by SACM with a joint mechanism and the so-called “dancing ring”. This drive was later further developed by SACM and Alsthom and used in the record locomotive CC 7100 and several Italian locomotives. However, the 242 AE 1 had no direct successor and was used on the Mont Cenis railway as SNCF 2BB2 3201 until 1967.