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First rigid aluminum, 1897, D. Schwarz50 ¢ 1991  Cuba 0.21 - 0.25$price on 04.12.2022
| Country: | Cuba |
| Type: | Postage stamps |
| Series: | Airships |
| Nominal: | 50 ¢ |
| Year: | 1991 |
| Perforation: | comb 13 x 12¾ |
Airships
First ellipsoidal, 1784, J.B.M. Meusnier0.07$ | 
First with steam engine, 1852, H. Giffard.0.08$ | 
First with gas engine, 1872, P.Haenlein0.08$ | 
First with gasoline engine, 1896, H. Wolfert0.13$ | 
First rigid aluminum, 1897, D. Schwarz0.21$ | 
LZ-129 Hindenburg, 1936, F. von Zeppelin0.19$ |
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