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Switzerland's youngest players during the 1940 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 | 21:134 | 7805 | 03 Mar 1940v Italy |
| Alfred Bickel | 21:193 | 7864 | 12 Nov 1939v Italy |
| Willy Huber | 26:125 | 9622 | 21 Apr 1940v Croatia |
| Lauro Amado | 27:242 | 10104 | 12 Nov 1939v Italy |
| Georges Aeby | 29:62 | 10655 | 12 Nov 1939v Italy |
| Severino Minelli | 30:66 | 11024 | 12 Nov 1939v Italy |
| August Lehmann | 30:289 | 11247 | 12 Nov 1939v Italy |
| Hermann Springer | 30:342 | 11300 | 12 Nov 1939v Italy |
| Andre Abegglen | 30:361 | 11319 | 03 Mar 1940v Italy |
| Adolf Stelzer | 31:213 | 11536 | 02 Apr 1940v Croatia |
| Sirio Vernati | 32:345 | 12033 | 21 Apr 1940v Croatia |