Stamps of Bulgaria, 4 May 1973
1 to 2 of 2
postage
1973, May 4 IBRA '73 issue unwmk imperf
| - | 1l | multi | No 1912 with green Imprint | — | — | |
| - | 1l | multi | No 1912 with gray Imprint | — | — |
1 to 2 of 2
| - | 1l | multi | No 1912 with green Imprint | — | — | |
| - | 1l | multi | No 1912 with gray Imprint | — | — |