Well this is cool as hell, apparently a genuine Cold War-era spy microphone disguised as a watch. Looks like a typical 1950s chronograph, but actually acts as a microphone hooked up to a cable which goes up the wearers sleeve and connects to a recording device.

PROTONA SPY WATCH CHRONOGRAPH MINIFON https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/264351198278

 

https://www.cryptomuseum.com/covert/rec/minifon/special/index.htm

 

Several of these showed up on the market several years ago. I suspect some European police department had sold them off as obsolete or surplus.
Not exactly state of the art these days. Cool factor remains high.