"Self-Winding" (Not Perpetual Motion!) Pocket Watch
Apparently, this is a self-winding watch according to the manufacturer. Does it mean it is actually a perpetual motion machine? Does it break the laws of physics? We may never know. Probably not. Don't get your hopes up. (Allow 2-4 weeks of processing)
Perpetual motion is motion of bodies that continues indefinitely. A perpetual motion machine is a hypothetical machine that can do work indefinitely without an energy source. This kind of machine is impossible, as it would violate the first or second law of thermodynamics.
These laws of thermodynamics apply even at very grand scales. For example, the motions and rotations of celestial bodies such as planets may appear perpetual, but are actually subject to many processes that slowly dissipate their kinetic energy, such as solar wind, interstellar medium resistance, gravitational radiation and thermal radiation, so they will not keep moving forever.
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