| Frame | Model type | Establish year | Name |
|---|---|---|---|
| Model 450 | |||
| 300101 | DT250-2 499 | 1975 | DT250Ⅱ |
| - | DT250-2 | 1975 | |
| Model 1N6 | |||
| 101 | DT250M 1N6 | 1977 | DT250M |
| Model DT1F | |||
| - | DT250 | 1971 | DT250 |
| Frame | Model type | Establish year | Name |
|---|---|---|---|
| Model 450 | |||
| 300101 | DT250-2 499 | 1975 | DT250Ⅱ |
| - | DT250-2 | 1975 | |
| Model 1N6 | |||
| 101 | DT250M 1N6 | 1977 | DT250M |
| Model DT1F | |||
| - | DT250 | 1971 | DT250 |