| Issuer | Date | Desc | State | ||
| - | no image | GuineaBissau | 2/27/1978 | Airships 1978, sheet of 1 type | |
| - | no image | GuineaBissau | 3/16/1978 | World Cup 1978, sheet of 1 type | |
| - | no image | GuineaBissau | 4/17/1978 | Endangered Animals 1978, sheet of 1 type | |
| - | no image | GuineaBissau | 6/15/1978 | empty sheet (#65833) | incomplete |
| - | no image | GuineaBissau | 6/15/1978 | empty sheet (#65834) | incomplete |
| - | no image | GuineaBissau | 6/15/1978 | empty sheet (#65835) | incomplete |
| - | no image | GuineaBissau | 6/15/1978 | empty sheet (#65836) | incomplete |
| - | no image | GuineaBissau | 10/2/1978 | empty sheet (#65837) | incomplete |
| - | no image | GuineaBissau | 11/14/1978 | empty sheet (#65838) | incomplete |
| - | no image | GuineaBissau | 12/15/1978 | empty sheet (#65839) | incomplete |