Check out Frederick Koolhoven's haircuts throughout his career:
Frederick Koolhoven had a variety of different hairstyles during his lifetime. He reached fame as a great aerospace engineer and engineer. However, the Dutch aerospace engineer was especially known for his incomparable looks and his livable character. Before his tragic passing at age 60 he was frequently in the spotlight of the press because of his marvelous looks. Check out Frederick Koolhoven's former looks right here: