Airships, 75th anniv. of the Zeppelin

Set of 6 stamps.

2c Baladeuse by Santos-Dumont, 1903.
3c, Baldwin’s, 1908, and US flag.
5c, Tissandier brothers’, 1883.
25c, Parseval PL VII, 1912.
40c, Nulli Secundus II, 1908.
50c, R34 rigid airship, 1919.