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Switzerland's youngest players during the 1957 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 |
|---|---|---|---|
| Heinz Schneiter | 21:332 | 8003 | 10 Mar 1957v Spain |
| Hans Weber | 22:7 | 8043 | 15 Sep 1956v Netherlands |
| Norbert Eschmann | 23:180 | 8581 | 15 Sep 1956v Netherlands |
| Andre Grobety | 23:331 | 8732 | 19 May 1957v Scotland |
| Eugen Meier | 26:138 | 9635 | 15 Sep 1956v Netherlands |
| Roger Vonlanthen | 26:165 | 9662 | 19 May 1957v Scotland |
| Josef Hugi | 26:292 | 9789 | 11 Nov 1956v Italy |
| Charles Antenen | 26:316 | 9813 | 15 Sep 1956v Netherlands |
| Willy Kernen | 27:40 | 9902 | 15 Sep 1956v Netherlands |
| Eugene Parlier | 27:271 | 10133 | 11 Nov 1956v Italy |
| Fritz Morf | 29:40 | 10633 | 10 Mar 1957v Spain |
| Robert Ballaman | 30:143 | 11101 | 11 Nov 1956v Italy |
| Charles Casali | 33:198 | 12252 | 11 Nov 1956v Italy |