| 1968 | 1975 | 1980 | 1981 |
 |
 |
 |
 |
| Mayan Calendar | Close Up | ||
| SG | SG 681 | SG 960 | SG 1046 |
| Scott 266 | Scott 675 | Scott 947 | Scott 1032 |
| Imperf | |||
| Stylised Owl | Stylised Owl | Chestnut Owlet | Stylised Owl |
| 1985 | 1985 |
 |
 |
| SG 1237 | SG 1238 |
| Scott 1126 | Scott 1127 |
| Imperf | Imperf |
| Barn Owl | White Faced Scops Owl |
