Robert Houdin glass dial mystery clock with double plate glass dial. Fixed front plate has reverse painted black Roman numerals, gilt arrow pointer hand fixed to the rear glass plate that rotates, driven by gears on its outer edge contained in brass bezel. The dial is fixed on gilt bronze filigree moulded arms raising up from the center stem containing more gears and arms connecting to the escapement of the movement, the two-tone bronze base has a serpentine form with applied filigree and putti. Round French brass spring driven silk thread movement signed "Hy (Henry) Marc - Paris" has and hour strike on a bell in the base. The front mounted escapement engages a large crown wheel in the back of the movement which rotates a series of rods and gears running up through the stem and right support arm that turns the rear glass plate to which the indicator is attached.

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