| 1948 | 1962 | 1968 |
 |
 |
 |
| Close Up | ||
| SG 1027 | SG 1851 | SG 2350 |
| Scott C53 | Scott C229 | Scott 1893 |
| Imperf | Imperf | Imperf |
| Stylised Owl | Eagle Owl | Eurasian Scops Owl |
| 1968 | 1968 | 1968 | 1968 |
 |
 |
 |
 |
| Mayan Calendar | Mayan Calendar | Mayan Calendar | Mayan Calendar |
| SG | SG | SG | SG |
| Scott C277 | Scott C278 | Scott C279 | Scott C280 |
| Stylised Owl | Stylised Owl | Stylised Owl | Stylised Owl |
| 1968 | 1968 | 1968 | 1968 |
 |
 |
 |
 |
| Mayan Calendar | Mayan Calendar | Mayan Calendar | Mayan Calendar |
| SG | SG | SG | SG |
| Scott C281 | Scott C282 | Scott C283 | Scott CB31 |
| Stylised Owl | Stylised Owl | Stylised Owl | Stylised Owl |
| 1968 |
 |
| Mayan Calendar |
| SG |
| Scott 1924 |
| Stylised Owl |
| 1981 | 1982 | 1984 |
 |
 |
 |
| Close Up | ||
| SG MS3373 | SG 3466 | SG 3553 |
| Scott 2685 | Scott 2762 | Scott 2848 |
| MS | ||
| Imperf | Imperf | Imperf |
| Stylised Owl | Stylised Owl | Stylised Owl |
| 1984 | 1984 | 1984 | 1984 | 1984 | 1984 | 1984 |
 |
 |
 |
 |
 |
 |
 |
| SG 3600 | SG 3601 | SG 3602 | SG 3603 | SG 3604 | SG 3605 | SG 3606 |
| Scott 2887 | Scott 2888 | Scott 2889 | Scott 2890 | Scott 2891 | Scott 2892 | Scott 2893 |
| Imperf | Imperf | Imperf | Imperf | Imperf | Imperf | Imperf |
| Barn Owl | Little Owl | Tawny Owl | Long Eared Owl | Snowy Owl | Ural Owl | Eagle Owl |
| 2000 | 2001 | 2008 |
 |
 |
 |
| SG 4499 | SG 4560 | SG |
| Scott B366 | Scott 3757 | Scott 4079 |
| Long Eared Owl | Unidentified Owl | Stylised Owl |
| 2001 | 2013 |
 |
 |
| SG MS4574 | SG |
| Scott 3761 | Scott |
| Barn Owl | Eagle Owl |