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Switzerland's youngest players during the 1939 season, and their age in years and days on the occasion of their final appearance, starting or coming on as a substitute.
For each player age is measured in days, and in years and days, from their date of birth to the day of their first appearance.
| Player | Age (Y:d) | Age (days) | Match |
|---|---|---|---|
| Erwin Ballabio | 20:115 | 7420 | 12 Feb 1939v Portugal |
| Alfred Bickel | 20:139 | 7444 | 18 Sep 1938v Republic of Ireland |
| Eugen Walaschek | 22:89 | 8125 | 18 Sep 1938v Republic of Ireland |
| Albert Guinchard | 24:94 | 8860 | 12 Feb 1939v Portugal |
| Willy Huber | 24:275 | 9041 | 18 Sep 1938v Republic of Ireland |
| Ernest Lortscher | 25:186 | 9318 | 18 Sep 1938v Republic of Ireland |
| Lauro Amado | 26:187 | 9684 | 18 Sep 1938v Republic of Ireland |
| Georges Aeby | 28:8 | 10235 | 18 Sep 1938v Republic of Ireland |
| Severino Minelli | 29:11 | 10604 | 18 Sep 1938v Republic of Ireland |
| Andre Abegglen | 29:194 | 10787 | 18 Sep 1938v Republic of Ireland |
| August Lehmann | 29:234 | 10827 | 18 Sep 1938v Republic of Ireland |
| Hermann Springer | 29:287 | 10880 | 18 Sep 1938v Republic of Ireland |
| Adolf Stelzer | 30:79 | 11037 | 20 Nov 1938v Italy |
| Sirio Vernati | 31:129 | 11452 | 18 Sep 1938v Republic of Ireland |