Sheets of Czechoslovakia, 1977
| Issuer | Date | Desc | State | ||
| - |  |
Czechoslovakia | 10/4/1977 | European Co-operation for Peace, empty sheet (#3958) | incomplete |
| - |  |
Czechoslovakia | 10/4/1977 | European Co-operation for Peace, empty sheet (#3959) | incomplete |
| - |  |
Czechoslovakia | 10/4/1977 | European Co-operation for Peace, empty sheet (#3960) | incomplete |
| - |  |
Czechoslovakia | 10/4/1977 | European Co-operation for Peace, empty sheet (#3961) | incomplete |
| - |  |
Czechoslovakia | 10/4/1977 | European Co-operation for Peace, empty sheet (#3962) | incomplete |
| - |  |
Czechoslovakia | 10/4/1977 | European Co-operation for Peace, empty sheet (#3963) | incomplete |