1930 (September 24-25), Baltic Sea Flight cover to Budapest, franked by vertical pair of red Zeppelin overprint on 10m gray lilac, tied by Helsinki ''24.IX.30'' ds, Finnish confirmation marking, Friedrichshafen ''25.9.30'' drop and ''30.SEP.27'' Budapest arrival hs, 3mm cover tear at top, otherwise F/VF, Sieger #89B, €675, Est. $250-$300 (Image)