Sheets of Colombia, 1977
| Issuer | Date | Desc | State | ||
| - |  |
Colombia | 6/7/1977 | Opening of Philatelic Museum, Medellin, sheet of 1 type | all added |
| - |  |
Colombia | 7/27/1977 | Opening of Postal Museum, Bogota, sheet of 1 type | all added |
| Issuer | Date | Desc | State | ||
| - | |
Colombia | 6/7/1977 | Opening of Philatelic Museum, Medellin, sheet of 1 type | all added |
| - | |
Colombia | 7/27/1977 | Opening of Postal Museum, Bogota, sheet of 1 type | all added |