| Name | Participants | Dates | Stamps | ||
| Europa 1969 | 25 | (with Andorra (Fr) - Vatican City) | 1969 | 50 | (incomplete) |
| Europa 1970 | 18 | (with Andorra (Fr) - Turkey) | 1970 | 39 | (incomplete) |
| Europa 1971 | 15 | (with Belgium - Switzerland) | 1971 | 31 | (incomplete) |
| Europa 1972 | 22 | (with Andorra (Fr) - Turkey) | 1972 | 46 | (incomplete) |
| Iron Gate dam | 2 | (with Romania) | 1965 | 7 | (incomplete) |