A mystery watch or mystery clock, in horology, is a timepiece whose working is not easily deducible, because it seems to have no movement at all, or the hands do not seem to be connected to any movement. One example is a type of mechanical watch where the movement is transmitted to the hands through a transparent crystal toothed wheel.
A mystery watch or mystery clock, in horology, is a timepiece whose working is not easily deducible, because it seems to have no movement at all, or the hands do not seem to be connected to any movement. One example is a type of mechanical watch where the movement is transmitted to the hands through a transparent crystal toothed wheel.
Source: Wikipedia "Mystery watch" · CC BY-SA 4.0
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