Nevermind. I figured it out.
The link I posted to the cosplay site forum was a post that someone had recreated from the
ODST Field Guide on bungie.net. From that guide:
In addition, every current issue helmet is equipped with low-light vision enhancement [ODST BIOS A29.817941B.01 or later].
Yet in the actual game, the string appears with a transposed B and 8 as: ODST BIOS A29.B179418.01
So get ready for the debate. One one side: "Be realistic! It was a typo!" and on the other: "Bungie never makes a mistake. It must mean something!"
Me? I'm just reporting the facts.