Romania 1913 SECOND BALKAN WAR Bulgaria Smuggled Ship Due Cover to Switzerland

Cover originating in Russe, Bulgaria, on the Danube, c. July 19, 1913, smuggled behind enemy lines of the invading Romanian army to the Hungarian, now Romanian port of Orsova on the Danube Steamship Company (DDSG) paddlewheel "Albrecht", where it was placed in the mails, franked with 10fi Hungarian definitive, tied by Orsova c.d.s., to Zurich, Switzerland, affixed with 30c Swiss postage due, tied by Zurich c.d.s. (26 VII), the only recorded example of this type of mail carriage, striking and fine, ex Galitz.