| 1946 | 1976 |
 |
 |
| SG 1185 | SG 2418 |
| Scott B420 | Scott 941 |
| Stylised Owl | Stylised Owl |
| 1979 | 1979 |
 |
 |
| SG 2550 | SG 2550 |
| Scott 1024 | Scott 1024 |
| Twl Uilenspiegel - Uilen is owl in Flemish | Twl Uilenspiegel - Uilen is owl in Flemish |
| 1981 |
 |
| SG 2676 |
| Scott 1108 |
| Stylised Owl |
| 1988 | 1999 |
 |
 |
| SG 2941 | Rejected Design |
| Scott 1284 | Dutch Text |
| French Text | |
| Stylised Owl | Little Owl |
| 1999 | 1999 |
 |
 |
| SG 3477 | SG 3478 |
| Scott 1724 | Scott 1725 |
| Little Owl | Tawny Owl |
| 1999 | 1999 |
 |
 |
| SG 3479 | SG 3480 |
| Scott 1726 | Scott 1727 |
| Long Eared Owl | Barn Owl |