1930, Airplane over Mountains and Vaduz Castle, 15rp-1fr, complete set of six, nicely centered unfolded blocks of four, full OG, NH, VF, C.v. $2,072++, SBK #F1-6, C.v. CHF3,000 as singles

400.00

1931, Zeppelin and Airship Hindenburg, 1fr and 2fr, two complete sets of two, nice centering and fresh colors, full OG, NH, VF, C.v. $725, SBK #F7-8, F14-15, C.v. CHF1,100

150.00

1939, Birds, 10rp-2fr, complete set of seven in sheets of 50 (5x10), full OG with just a few occasional yellowish spots (2-3 stamps affected in 4 of 7 sheets), NH, VF, C.v. $2,000 as singles, SBK #F17-23, C.v. CHF3,500++
Click the numbers below to see additional images:
2, 3, 4, 5, 6, 7

300.00

1930 (November 11), Netherlands Flight postcard, franked by 5 air post stamps of the first issue (C.v. $273 for stamps on cover), tied by Schaan ds, Friedrichshafen "10.11.30" connection, blue and violet confirmation markings, mostly VF, Sieger #98

100.00

1936 (May 6-14), Airship "Hindenburg" 1st NA Direct and Return Flights cover franked by Zeppelin stamps of 1fr and 2r, upon arrival to NYC uprated by 50c lilac, German and American confirmation markings and all appropriate transit and arrival date stamps on reverse, mostly VF and scarce mixed franked cover, Sieger #408c var

200.00