| BULGARIA | 1955 (28 March) Sofia - Austria, Wien (30 March) Registered comercial multifkd envelope tied cds + R-label. Airmail. Arrival reverse. |
U$ | 14 |
| BULGARIA | 1955 (28 March) Sofia - Austria, Wien (30 March) Registered comercial multifkd envelope tied cds + R-label. Airmail. Arrival reverse. |
U$ | 14 |