| 1960 | 1960 |
 |
 |
| Stylised Owl | Stylised Owl |
| 1963 | 1968 |
 |
 |
| Stylised Owl | Stylised Owl |
| 1973 | 1973 |
 |
 |
| Stylised Owl | Stylised Owl |
| 1981 | 1986 |
 |
 |
| Stylised Owl | Stylised Owl |
| 1989 | 1993 |
 |
 |
| Stylised Owl | Stylised Owl |
| 1994 | 1995 |
 |
 |
|
Stylised Owl |
Stylised Owl |
| 1998 | 2000 |
 |
 |
|
Stylised Owl |
Stylised Owl |
| 2001 | 2002 |
 |
 |
|
Stylised Owl |
Stylised Owl |
| 2003 | 2004 |
 |
 |
|
Stylised Owl |
Stylised Owl |
| 2007 | 2010 |
 |
 |
| Stylised Owl | Stylised Owl |