Stamps of Bulgaria, 7 Jun 1977
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postage
1977, Jun 7 1150th Birthday of Kyrillos issue unwmk p. 13
| - | 1l | multi |
1977, Jun 7 International Writers Conference issue
| - | 23s | multi | congress emblem | — | — | |
| - | 23s | multi | — | — |
1 to 3 of 3
| - | 1l | multi |
| - | 23s | multi | congress emblem | — | — | |
| - | 23s | multi | — | — |