First flight of Seibel S-3
Saturday, September 20, 1947
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Description
Source: Paul Lambermont, Anthony Pirie. Helicopters & Autogyros of the World, 2nd ed. Cassell & Company Ltd., 1959. Page 371.
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Description
Source: Paul Lambermont, Anthony Pirie. Helicopters & Autogyros of the World, 2nd ed. Cassell & Company Ltd., 1959. Page 371.
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