| 1971 | 1972 | 1972 |
 |
 |
 |
| Cover | ||
| Stylised Owl | Eagle Owl |
| 1982 | 1985 | 1986 | 1986 |
 |
 |
 |
 |
| Stylised Owl | Stylised Owl | Stylised Owl | Stylised Owl |
| 1988 | 1988 | 1989 |
 |
 |
 |
| Stylised Owl | Stylised Owl | Stylised Owl |
| 1990 | 1990 | 1990 | 1991 |
 |
 |
 |
 |
| With date | |||
| Stylised Owl | Stylised Owl | Stylised Owl | Stylised Owl |
| 1991 |
1992 |
1992 |
 |
 |
 |
| Stylised Owl | Stylised Owl | Stylised Owl |
| 1993 | 1994 | 1997 |
 |
 |
 |
| Stylised Owl | Stylised Owl | Stylised Owl |
| 1997 | 1997 | 1998 | 1998 |
 |
 |
 |
 |
| Stylised Owl | Stylised Owl | Stylised Owl | Stylised Owl |
| 2002 | 2005 | 2005 | 2009 | 2014 |
 |
 |
 |
 |
 |
| Close Up | Cover - Rosetta stone | |||
| Stylised Owl | Stylised Owl | Stylised Owl | Stylised Owl | Stylised Owl |
