Early Aviation design type (#10113)

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Czechoslovakia airmail 9/15/1977 60h issue=PRAGA 78 d d=LZ 127 Graf Zeppelin 1928 perf=11.25x11.5

Czechoslovakia airmail 9/15/1977 1kc issue=PRAGA 78 d d=Ader 1890 Leole Dunn 1914 ngo etrich holubice 1909 perf=11.25x11.5

Czechoslovakia airmail 9/15/1977 1.60kc issue=PRAGA 78 d d=Ballon Blanchard 1785 perf=11.25x11.5

Czechoslovakia airmail 9/15/1977 2kc issue=PRAGA 78 d d=1895 Otto Lilienthal perf=11.25x11.5

Czechoslovakia airmail 9/15/1977 4.40kc issue=PRAGA 78 d d=Jan Kaspars plane Pardubice 1911 perf=11.25x11.5