| AUSTRIA | 1906 (25 July) CROATIA. Volosca, Opatja, Istna - Belgrade, Serbia (13 July Gregorian) + RETOUR mns postal cachet. Fkd comercial envelope. Fine. |
U$ | 50 |
| AUSTRIA | 1906 (25 July) CROATIA. Volosca, Opatja, Istna - Belgrade, Serbia (13 July Gregorian) + RETOUR mns postal cachet. Fkd comercial envelope. Fine. |
U$ | 50 |