In Thunderball (1965) a real jet pack was used in the pre title sequence. It was called the Bell Rocket Belt and had been developed for the US army in early 1960s.
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Bell Rocket Belt - Wikidata
Fig9. The Bell Rocket belt a rocket pack is a first attempt to apply... | Download Scientific Diagram
Bell Rocket Belt - Wikipedia
Bell Rocket Belt No.2 editorial stock photo. Image of steven - 9253938
Raketenrucksack – Wikipedia
the story of man's desire to fly like an eagle | Rocket belt, Inventions, Jetpack
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File:Bell Rocket Belt – James Bond Thunderball.JPG - Wikimedia Commons
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Bell Rocket Belt - Wikipedia
Bell Rocket Belt"
Up, up and down: The ephemerality and reality of the jetpack | Engadget
The Bell Rocket Belt. There were only a few made, they have one! - Picture of Niagara Aerospace Museum, Niagara Falls - Tripadvisor