In keeping with the bolierplate and rivets theme, 1964's
First Men in the Moon featured the Cavorite sphere.
A first of it's kind, not cylindrical or disc shaped, but spherical. No rocket exhaust either as it used antigravity for propulsion and was designed to roll to a stop upon reaching its destination; a precursor to the real-life Mars Rover missions which used airbags to bounce to a stop.