1932 ( May 2-6), 4th SAF cover to Brazil, franked by ten stamps, including two blocks of four, tied by Vatican City ''29.4.32'' ds, Munich transit (30.4. - on reverse), Berlin-Friedrichshafen connection and Flight cachet are on front, Santos ''6.Mai.32'' arrival marking, mostly VF and very scarce, Sieger #157, €950, Est. $700-$800 (Image)

1932 (August 29 - September 2), 5th SAF cover to Brazil, franked by nine stamps, tied by Vatican City ''26.8.32'' ds, Friedrichshafen connection (29.8.) and confirmation cachet in violet, Bahia ''2.IX.32'' receiver, mostly VF and scarce, Sieger #171, €700, Est. $400-$600 (Image)

1932 (October 10-14), 8th SAF cover to Argentina, franked by two values, tied by Vatican City ''3.10.32'' ds, uprated by two Italian stamps at Ventimiglia (one is not cancelled) with transits of Genoa and Milan on reverse, Friedrichshafen connection (10.10.) and red Flight cachet, Buenos Aires ''15.OCT.32'' arrival marking, mostly VF and rare, signed by Arthur Falk on reverse, Sieger #189, €1,300, Est. $900-$1,000 (Image)

1933 (May 29-30), Italy Flight postcard to Friedrichshafen, franked by two values, cancelled ''28.5.33'' at Vatican City, uprated by Italian Zeppelin stamp of 3L, tied by machine Rome ''29.5.33'' ds, blue flight cachet, green Friedrichshafen ''30.5.33'' special Zeppelin marking, VF and scarce, Sieger #208 Vh, €750, Est. $400-$500 (Image)

1933 (May 29-30), Italy Flight cover to Friedrichshafen, franked by two values, cancelled ''28.5.33'', uprated by Italian Zeppelin stamp of 5L, which tied by machine Rome ''29.5.33'' date stamp on front, the same Rome machine marking is presented on reverse, blue flight cachet, green Friedrichshafen ''30.5.33'' machine arrival postmark, VF and scarce, Sieger #208 Vi, €850, Est. $500-$600 (Image)