| Issuer | Date | Desc | State | ||
| - | no image | GuineaBissau | 7/27/1977 | 75th Anniversary of the Nobel Prize, sheet of 1 type | incomplete |
| - | no image | GuineaBissau | 9/30/1977 | 100th Anniversary of the Universal Postal Union, sheet of 1 type | |
| - | no image | GuineaBissau | 10/15/1977 | 25th Anniversary of Regency of Queen Elizabeth II, sheet of 1 type | |
| - | no image | GuineaBissau | 11/15/1977 | 400th Anniversary of the Birth of Peter Paul Rubens, sheet of 1 type |