Other countries–Stamps of Slovenian interest

Kingdom of Yugoslavia

,278/9, 340/1, 343,Kingdom of Yugoslavia. Picture postcard of Zagreb franked with Din. 5,50 Din. (overpaid by Din.1.00) sent by airmail from Ptuj (27.VII.38) to Söflingen (near Ulm). Rare Slovenian label "Z avionom / Par avion".