Dr. K. Witmer Elektronik AG:
| Model | Date | Group | Description |
|---|---|---|---|
| IC Triple 100 | 01 March 1986 | Power supply | |
| IC Triple Z | 01 January 1976 | Power supply | |
| IEEE Option | 01 January 1982 | Power supply | |
| MB 0030/20/3 | Power supply | ||
| MC 0050/20/3a | 01 January 1966 | Power supply | |
| TI 36/4 ATE | 01 January 1983 | Power supply |
