



Lot 5
A Two day marine Chronometer 6.5x6.5x6.5ins(16.5x16.5x16.5cm)
15 April 2014, 14:00 BST
London, Knightsbridge£1,500 - £2,000
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A Two day marine Chronometer
by T. Cotterell & Co, London, elevé de Parkinson & Frodsham, 952/2625, circa 1830.
With chain fusee and maintaining power to a freesprung white metal helical spring terminating in a bimetallic Z-type balance with circular timing weights. Signed and numbered on the 3.5 ins.(9cm) silvered Roman and Arabic dial with subsidiaries for state of wind and running seconds, mounted on gimbals in a three part case with blank cartouche. The case, 6.5x6.5x6.5ins(16.5x16.5x16.5cm)
With chain fusee and maintaining power to a freesprung white metal helical spring terminating in a bimetallic Z-type balance with circular timing weights. Signed and numbered on the 3.5 ins.(9cm) silvered Roman and Arabic dial with subsidiaries for state of wind and running seconds, mounted on gimbals in a three part case with blank cartouche. The case, 6.5x6.5x6.5ins(16.5x16.5x16.5cm)
Footnotes
Thomas Cotterell worked as a chronometer maker at 163 Oxford Street, London between 1825-1833. He took part in chronometer trials at the Royal Observatory Greenwich during this period and won an award in 1831.
Gloria Clifton. Directory of British Scientific Instrument Makers 1550-1851.