1930 (June 30), Graf Zeppelin surcharge and overprints, 5c/10c, 10c, 15c, 25c and 1b used on registered cover from Cochamamba to NY, violet boxed cancellation, no backstamp, VF, C.v. $430 as for stamps off cover, Est. $150-$200 (Image)

1930, ''Z'' (Zeppelin) surcharges 1.50b/15c, 3b/20c and 6b/35c, unused and used complete sets of three and in addition two stamps with comma variety, most with OG (C26 - no gum), C26 has tiny thin spot, F/VF, C.v. $705, Est. $250-$300 (Image)

1932 (April 9-13), 2nd Return SAF card and cover from Cochabamba to Germany, franked by 17 (10 - on reverse) or 26 (20 - on reverse) stamps respectively, green Flight cachet, Friedrichshafen ''13.4.32'' arrival ds, VF, card with B. Moorhouse certificate, Sieger #146, Est. $150-$200 (Image)

1932 (April 23-27), 3rd Return SAF card and cover from Cochabamba to Germany, franked by 5 or 4 stamps respectively, German oval confirmation marking in red (not mentioned in Sieger for that flight), Friedrichshafen ''27.4.32'' arrival marking, VF, each one with B. Moorhouse certificate, Sieger #151 var, Est. $150-$200 (Image)

1932 (May 6-10), 4th Return SAF card and pre-printed cover from Cochabamba to Germany, each one franked by four values, card with straight line confirmation, Friedrichshafen or Berlin ''10.5.32'' arrival markings, VF, Sieger #160 var, Est. $150-$200 (Image)