Thomas Earnshaw Invenit et Fecit, No. 764-3368, with London hallmarks for 1836. Fine and rare silver pocket chronometer. | Important Collectors Wristwatches Pocket Watches & Clocks | Geneva, Hotel Des Bergues, 21st October 1995

Important Collectors Wristwatches Po...

Geneva, Hotel Des Bergues, Oct 21, 1995

LOT 112

Thomas Earnshaw Invenit et Fecit, No. 764-3368, with London hallmarks for 1836. Fine and rare silver pocket chronometer.

CHF 10,000 - 12,000

C. Later specially made three body, "forme quatre baguettes", engine-turned with fixed cuvette, madked "J.B." (Josiah Barnett). D. White enamel with Roman numerals and subsidiary seconds. Gold "pear" bands. M. Gilt brass full plate with cylindrical pillars, fusee with chain and maintaining power, Earnshaw spring detent escapement, polished steel three-arm balance, flat balance spring with Earnshaw sugar-tongue bimetallic compensation, gilt brass balance spring engraved with scrolling foliage and ruby endstone. Signed on the dial and back plate. In very good condition. Diam. 56 mm.

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Note: Several pocket chronometer movements with sugar-tongue compensation, were left in gray by Thomas Earnshaw and subsequently finished, cased and sold by his son in the 1820's -1830's. An almost identical pocket chronometer, No. 1035/3932 in a silver hunting case made in 1837, from the collection of the Time Museum (Rockford, Illinois) is described by Anthony Randall in the catalogue of the Museum, page 157.