| Frame | Model type | Establish year | Name |
|---|---|---|---|
| Model AB04 | |||
| 1000041 | NX50Z | 1979 | Karen NX50 |
| 1000051 | NX50MZ | 1979 | Karen NX50M |
| 1104456 | NX50Z | 1979 | Karen NX50 |
| 1115956 | NX50MZ | 1979 | Karen NX50M |
| 2000031 | NX50MB2 | 1981 | Karen S |
| 2002581 | NX50MB | 1981 | Karen NX50M |
| 2002586 | NX50MB | 1981 | |
| 2017802 | NX50B | 1981 | Karen NX50 |