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Luxembourg's youngest players during the 1964 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 |
|---|---|---|---|
| Henri Klein | 19:195 | 7135 | 27 Oct 1963v France |
| Jean Klein | 20:264 | 7569 | 11 Sep 1963v Netherlands |
| Johny Léonard | 22:58 | 8094 | 01 Dec 1963v Belgium |
| Louis Pilot | 22:303 | 8339 | 11 Sep 1963v Netherlands |
| Nicolas Hoffmann | 23:22 | 8423 | 11 Sep 1963v Netherlands |
| Adolphe Schmit | 23:24 | 8425 | 11 Sep 1963v Netherlands |
| Camille Dimmer | 24:193 | 8959 | 30 Oct 1963v Netherlands |
| René Schneider | 25:189 | 9321 | 27 Oct 1963v France |
| Jean-Pierre Hoffstetter | 25:318 | 9450 | 11 Sep 1963v Netherlands |
| Théo Stendebach | 26:224 | 9721 | 01 Dec 1963v Belgium |
| Nico Schmitt | 26:342 | 9839 | 11 Sep 1963v Netherlands |
| Paul 'Schnuck' May | 28:83 | 10310 | 11 Sep 1963v Netherlands |
| Jean-Pierre Fiedler | 28:228 | 10455 | 11 Sep 1963v Netherlands |
| Fernand Brosius | 29:118 | 10711 | 11 Sep 1963v Netherlands |
| Francois 'Bitzi' Konter | 29:202 | 10795 | 11 Sep 1963v Netherlands |
| Ernest Brenner | 31:363 | 11686 | 11 Sep 1963v Netherlands |