| Super League 1989/1990 Abstieg Gruppe A - Appearances as Referee |  |
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| 11/04/1990 | FC Chur | - | FC Fribourg | 1:3 | - | - | - |
| 16/04/1990 | Servette FC | - | Yverdon Sport FC | 1:0 | 2 | - | - |
| Super League 1989/1990 Abstieg Gruppe A - Appearances as Referee | |
|
|
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| 11/04/1990 | FC Chur | - | FC Fribourg | 1:3 | - | - | - |
| 16/04/1990 | Servette FC | - | Yverdon Sport FC | 1:0 | 2 | - | - |
| Complete name: | Michel Zen Ruffinen |
| Born: | 24/04/1959 |
| Place of birth: |
Switzerland |
| Nationality: |
Switzerland |