| Frame | Model type | Establish year | Name |
|---|---|---|---|
| Model AC12 | |||
| 1000001 | NSB50M 2J | 1991 | NS-1 |
| NSB50M J | 1991 | ||
| 1100001 | NSB50P 2J | 1993 | |
| NSB50P J | 1993 | ||
| 1200001 | NSB50R 2J | 1994 | |
| NSB50R 3J | 1994 | ||
| NSB50R J | 1994 | ||
| 1300001 | NSB50S 2J | 1995 | |
| NSB50S J | 1995 | ||
| 1400001 | NSB50T 2J | 1996 | |
| NSB50T J | 1996 | ||
| 1500001 | NSB50V 2J | 1997 | |
| NSB50V J | 1997 | ||
| 1600001 | NSB50W 3J | 1998 | |