| Model name |
Manufacturer |
Production dates (Approx) | |
| SPECTRUM DX (X635) | Matsumoku | 1985-87 |
|
| SPECTRUM GT (X650) | Matsumoku | 1985-88 |
|
| SPECTRUM LX (X695) | Matsumoku | 1985-87 |
|
| SPECTRUM ST (X630) | Matsumoku | 1985-88 |
|
| SPECTRUM SERIES II | Matsumoku |
1987-88 |
|
| SPECTRUM I (WEB110) |
SLM Korean |
1989-90 |
|
| SPECTRUM II (WEB 220) | SLM Korean | 1989-90 |
|
| SPECTRUM V 5 STRING (WEB520) | SLM Korean | 1989-90 |
|