| KNVB beker 1975/1976 - Appearances as Referee |  |
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| 06/12/1975 | Go Ahead Eagles | - | Feyenoord | 4:5 pso | - | - | - |
| KNVB beker 1975/1976 - Appearances as Referee | |
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| 06/12/1975 | Go Ahead Eagles | - | Feyenoord | 4:5 pso | - | - | - |
| Complete name: | Siem Wellinga |
| Born: | 09/03/1931 |
| Place of birth: |
Netherlands |
| Residence: | Boekelo |
| Nationality: |
Netherlands |