| Class | Livery | Producer | Prod. Cod. | Company | Numeration |
| C 57 | Micro Ace | A 9901 | JR | C57 177 |
| Anno di costruzione/Year of construction: | 1937 |
| Numerazione/Service numbers: | |
| Rodiggio: | 2C1 |
| Potenza (Kw)/Power (Kw): | |
| V max (Km/h): | |
| Lunghezza (cm)/Lenght (cm): | 2028 |
| Stazza (T)/Weight (T): | 67,50 |
| Note: | Built in 201 pieces from 1937 to 1947. |
