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Same with any of these types of watch, the two 'hands' are transparent discs which are slightly larger than the viewable face area.
Then, either with gears on the edge of that disc or just with the usual centre pin, the whole disc turns and coloured bit / picture / hands or whatever, look like they float around.
My favourite is the Omega La Magique. This is a good look at how this one works.
How cool is that!?
What is the second hand btw?