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Airship (5)

  Graf Zeppelin Germany 1929 1929 Neptun L-5
  Hindenburg Germany 1936 Neptun L-1
  Shenandoah ZR-1 (airship) United States 1923 1923 Neptun L-11
  Los Angeles (airship) United States 1924 1924 Neptun L-12
  Macon ZRS-5 (airship - Goodyear) United States 1933 1933 Neptun L-4