| Friendlies 1937 - Appearances as Referee |  |
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| 21/03/1937 | Luxembourg | - | Germany | 2:3 | - | - | - |
| Friendlies 1937 - Appearances as Referee | |
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| 21/03/1937 | Luxembourg | - | Germany | 2:3 | - | - | - |
| Complete name: | Karl Wunderlin |
| Born: | 00/00/1892 |
| Place of birth: |
Switzerland |
| Nationality: |
Switzerland |