Complication · Display
Mystery Dial
Partially verifiedA display where the hands appear to float in mid-air without connection to the movement.
Definition
A display where the hands appear to float in mid-air without connection to the movement.
Historical origin
Invented by Jean-Eugène Robert-Houdin in the nineteenth century; famously refined by Cartier.
How it works
The hands are mounted on transparent sapphire discs with geared edges hidden in the bezel.
The movement drives the discs from the perimeter.
Pocket watch context
Mostly found in high-end clocks and some novelty pocket watches.
Wristwatch context
A signature style for Cartier and some independent makers.
Identification
- Hands with no visible central arbor
- Transparent dial space
Servicing notes
The discs must be kept perfectly clean; any dust is highly visible.
General guidance only. Complicated mechanisms should be assessed and serviced by a qualified watchmaker or clockmaker specialist, not adjusted at home.
Diagram
Sources & references
- de Carle, D., Watch and Clock Encyclopedia
- Britten, F. J., Old Clocks and Watches and Their Makers
- Horological Journal (British Horological Institute), technical articles
Where sources disagree, the disagreement is stated rather than resolved silently.