| 1961 | 1961 | 1986 | 1988 | ||
 |
 |
 |
|
||
| SG 624A (Timson) | SG 624B (Thrissell) | SG 1320 | SG 1405 & 1408 | ||
| Scott 380 | Scott 380a | Scott 1141 | Scott 1226 & 1229 | ||
| SG MS1409/Scott 1229a - MS | |||||
| Stylised Owl | Stylised Owl | Barn Owl | Stylised Owls |
| 2000 | 2001 | 2003 | 2007 |
 |
 |
 |
 |
| SG 2125 | SG 2180 | SG 2411 | SG 2751 |
| Scott 1890 | Scott 1946 | Scott 2166b | Scott 2480 |
| Sheet | Sheet - SG LS16 | ||
| Imperf | |||
| Barn Owl | Stylised Owl | Snowy Owl | Snowy Owl |
| 2003 |
 |
| SG 2327/31 |
| Scott 2087/91 |
| Barn Owls |
| 2010 |
 |
| SG 3125 |
| Scott 2846 |
| Stylised Owl |