After Jean Eugene Robert-Houdin. Glass Column Mystery Clock. A handsome example of Robert-Houdin?s double mystery clock, with a clear glass dial to which a single arrow-shaped hand is attached, Roman numerals with minute track, mounted to a clear glass tube terminating in four griffins, seeming to provide no connection between the clock and any hidden mechanism. Pale emerald plush-covered base with gilt appliques. Possible restoration or replacement of dial, top mount and bezel. Internal mechanism and construction of case consistent with original design. Height 19 ??. Dial 5? diam. Base 6 ? x 6 ??. Felt on base soiled, scuffed and worn.