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Liechtenstein's youngest players during the 1991 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 |
|---|---|---|---|
| Ralf Oehri | 14:136 | 5250 | 12 Mar 1991v Switzerland |
| Mario Frick | 16:186 | 6030 | 12 Mar 1991v Switzerland |
| Hansjorg Lingg | 19:131 | 7071 | 12 Mar 1991v Switzerland |
| Patrick Hefti | 21:112 | 7783 | 12 Mar 1991v Switzerland |
| Harry Zech | 22:14 | 8050 | 12 Mar 1991v Switzerland |
| Harry Schädler | 23:37 | 8438 | 12 Mar 1991v Switzerland |
| Christopher Ritter | 24:288 | 9054 | 12 Mar 1991v Switzerland |
| Wolfgang Ospelt | 26:65 | 9562 | 12 Mar 1991v Switzerland |