20,000 Leagues Under the Sea

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A
Nautilus diver's helmet. More than just a Nautilus
Diver's helmet, but a REAL Nautilus Diver's helmet. You
can tell this by observing the air hose inside the main porthole. Contrary
to popular belief, these diver's helmets were sealed, dry environments
inside, but they were not pressurized. This meant
that the divers still had to get their air by breathing through
a mouth piece even though they were completely dry.
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