C.1857 (dated) James Tuerlingx, New York, Patented SCREW Clock, Number 8, with copies of the original patent drawings, 30 hour.
Condition: well preserved with most of the original gilding intact on the case, and the glass surround still good, plus in running order. In operation, a cast bunch of grapes is pulled which raises a ring, against the urn shaped central weight, on which two special shaped discs rotate against the screw, causing it to turn, and allowing the weight to descend. The large balance beats seconds approximately, and is bi-metallic, split compensating with 4 timing screws, and with helical hairspring. There are 6 jewels in the 'scape, each of the 3 vertical arbors with 2 jewels. In appearance, one would expect a clock of this caliber and concept to have been European, and it is a tribute to American ingenuity that it was made in New York. Height 9 inches
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