Sheets of Mauritania, 1977 all added
| Issuer | Date | Desc | State | ||
| - |  |
Mauritania | 4/29/1977 | sheet of 1 type | all added |
| - |  |
Mauritania | 9/19/1977 | History of Aviation, sheet of 1 type | all added |
| - |  |
Mauritania | 12/19/1977 | World Cup 1978, sheet of 1 type | all added |