| Friendlies 1965 - Appearances as Referee |  |
 |
 |
||||
| 24/06/1965 | Portugal | - | Brazil | 0:0 | - | - | - |
| Friendlies 1965 - Appearances as Referee | |
|
|
||||
| 24/06/1965 | Portugal | - | Brazil | 0:0 | - | - | - |
| Complete name: | Karl Keller |
| Born: | 01/04/1923 |
| Place of birth: |
Switzerland |
| Residence: | Basel |
| Nationality: |
Switzerland |