Issuer | Date | Desc | State | ||
- | Poland | 5/9/1966 | empty sheet (#2125) | incomplete | |
- | Poland | 6/18/1966 | European Athletic Championships 1966, empty sheet (#2124) | incomplete | |
- | Poland | 7/21/1966 | Poland 1000th, sheet of 2 types | all added | |
- | Poland | 7/21/1966 | Poland 1000th, sheet of 2 types | all added |