It's not my video, and it won't let me post it on the site (says the video can only be plated on YouTube), but it's a full breakdown and history of this watch. Pretty cool!
"If someone could remove my cap to look inside me and clearly diagnose the faulty gear in my head that has a bad tooth, I am sure I would quit skipping some important work and spring up for the desired exercise that will keep me ticking well into the future too."
You can see the problem. My sentence, somewhat relative to the subject, is designed to precisely be a quarter minute read. But it is off just a little, like me.
Yes, the AN5740 would have been used primarily by navigators on bombers (B-29, B-17, B-24). It would have originally came with an anti-shock protective case like the one shown below.