| Issuer | Date | Desc | State | ||
| - | no image | Uruguay | 4/29/1979 | empty sheet (#25564) | incomplete |
| - | no image | Uruguay | 4/29/1979 | empty sheet (#25565) | incomplete |
| - | no image | Uruguay | 6/18/1979 | International Year of the Child, sheet of 2 types | |
| - | no image | Uruguay | 6/18/1979 | World Cup xx, sheet of 3 types | |
| - | no image | Uruguay | 6/18/1979 | empty sheet (#25568) | incomplete |