You can't get away from this joke.
Brian Schiavo made these cool rebreathers for Earthkiller.
I didn't notice until today that they said "C57D" on them. That's the designation of the ship in Forbidden Planet. It's also the designation of at least two ships in the Joss Whedon Firefly universe.
And now it's the designation of our rebreathers.
I think the only more famous ship designation would be Star Trek's Enterprise, with "NCC-1701". But even non-geeks know that one. The C57D joke is strictly an in-joke for dorks. So, er, I got it right away.