These were big in the 50's.
They fold up like a small box (iPhone size) and then open up to a pair of real binoculars.... although they're not much better than just looking at what you're trying to see.This pair is missing it's tag, but I think they're from Arrow Crystal made in Japan.
They're cool to look at, but again, not much help if you really want to use them. They make everything about 1/2 more size to a point.
but having cool items, even if they're not the best is still cool. And you'll be the only one using something like this... It's Vintage Gear for Guys!