| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| HOFFER | HW521 | Direct Cross Interchange | 1 |
| MEAT & DORIA | W521 | Direct Cross Interchange | 1 |
| LANCIA | 9943463* | Indirect Cross Interchange | 2 |
| FIAT | 9943463* | Indirect Cross Interchange | 2 |
| ALFA ROMEO | 9943464 | Indirect Cross Interchange | 2 |
| ALFA ROMEO | 9943463* | Indirect Cross Interchange | 2 |
| LANCIA | 9943464 | Indirect Cross Interchange | 2 |