These special timepieces’ hands appear to float on the dial. What’s the story behind them?

The clever engineering of a mechanical watch is typically hidden behind a dial, but it’s not particularly mysterious. That is, unless you find that the hands on your watch keep the time while appearing to float midair above the dial with no visible connection to anything else.
…
Continue here:
https://www.gearpatrol.com/watches/a35230039/best-mystery-dial-watches/