| Data validità | Prime Rate ABI | |
| Da | A | |
| 15/07/1977 | 30/07/1977 | 19,50 |
| 31/07/1977 | 14/08/1977 | 18,50 |
| 15/08/1977 | 30/08/1977 | 18,50 |
| 31/08/1977 | 14/09/1977 | 18,50 |
| 15/09/1977 | 29/09/1977 | 18,50 |
| 30/09/1977 | 14/10/1977 | 17,00 |
| 15/10/1977 | 30/10/1977 | 17,00 |
| 31/10/1977 | 14/11/1977 | 17,00 |
| 15/11/1977 | 29/11/1977 | 17,00 |
| 30/11/1977 | 14/12/1977 | 17,00 |
| 15/12/1977 | 30/12/1977 | 17,00 |
| 31/12/1977 | 14/01/1978 | 16,00 |
| 15/01/1978 | 30/01/1978 | 16,00 |
| 31/01/1978 | 14/02/1978 | 16,00 |
| 15/02/1978 | 27/02/1978 | 16,00 |
| 28/02/1978 | 14/03/1978 | 16,00 |
| 15/03/1978 | 30/03/1978 | 16,00 |
| 31/03/1978 | 14/04/1978 | 16,00 |
| 15/04/1978 | 29/04/1978 | 16,00 |
| 30/04/1978 | 14/05/1978 | 16,00 |
| 15/05/1978 | 30/05/1978 | 16,00 |
| 31/05/1978 | 14/06/1978 | 16,00 |
| 15/06/1978 | 29/06/1978 | 16,00 |
| 30/06/1978 | 14/07/1978 | 16,00 |
| 15/07/1978 | 30/07/1978 | 16,00 |
| 31/07/1978 | 14/08/1978 | 16,00 |
| 15/08/1978 | 30/08/1978 | 16,00 |
| 31/08/1978 | 14/09/1978 | 16,00 |
| 15/09/1978 | 29/09/1978 | 16,00 |
| 30/09/1978 | 14/10/1978 | 15,00 |
| 15/10/1978 | 30/10/1978 | 15,00 |
| 31/10/1978 | 14/11/1978 | 15,00 |
| 15/11/1978 | 29/11/1978 | 15,00 |
| 30/11/1978 | 14/12/1978 | 15,00 |
| 15/12/1978 | 30/12/1978 | 15,00 |
| 31/12/1978 | 14/01/1979 | 15,00 |
| 15/01/1979 | 30/01/1979 | 15,00 |
| 31/01/1979 | 14/02/1979 | 15,00 |
| 15/02/1979 | 27/02/1979 | 15,00 |
| 28/02/1979 | 14/03/1979 | 15,00 |
| 15/03/1979 | 30/03/1979 | 15,00 |
| 31/03/1979 | 14/04/1979 | 15,00 |
| 15/04/1979 | 29/04/1979 | 15,00 |
| 30/04/1979 | 14/05/1979 | 15,00 |
| 15/05/1979 | 30/05/1979 | 15,00 |
| 31/05/1979 | 14/06/1979 | 15,00 |
| 15/06/1979 | 29/06/1979 | 15,00 |
| 30/06/1979 | 14/07/1979 | 15,00 |
| 15/07/1979 | 30/07/1979 | 15,00 |
| 31/07/1979 | 14/08/1979 | 15,00 |
| 15/08/1979 | 30/08/1979 | 15,00 |