Mystery Torsion Crystal Regulator Clock

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This is a very rare mystery torsion clock by Guilmet which has its crank and stirrup escapement which is used in most of Guilmet's mystery clocks. A similar clock that we call a mystery clock is Guilmet's torsion pendulum clock page 136 of Derek Robert's Mystery Novelty and Fantasy book. This particular clock is most certainly a mystery clock as when you look at the bottom of the pendulum t does not appear to be any connection or movement above the rotating pendulum as in most of Guilmet's swingers, it is impercetible w the energy is coming from. This is an identical action as the 4 glass torsion clock. Most torsion clocks have an obvious visible drive to rotate the pendulum. A similar clock is in the British Museum part of the Ilbert collection.