Other countries–Stamps of Slovenian interest

Kingdom of Yugoslavia

,Ch. 202, 213,Cover, franked 27,5 cent., sent by airmail from Geneve (28.III.30) ti Vienna (29.III.30). From Vienna with first flight "Wien - Graz - Zagreb - Beograd" (31.III.30) to Zagreb (31.III.30). Only 20 items from Switzerland were flown on this flight.