It’s a watch. No it’s a mini alarm clock. That winds when you open and close its attractive leather case.
Okay, so the technology doesn’t seem great now. But in 1956, it was cutting edge stuff. And pretty sleek-looking too.
If you want to see what it looks like in color, here’s a video posted by an antique watch store (you only need to watch a few seconds to get the feel for it):
Apparently, the one featured in this video sold for $800, over four times its original cost.