Sold for:
46,000 CHF

Charles Frodsham, 84 Strand, London, circa 1880. Fine and rare gilt brass eight day going, giant timepiece carriage clock with chronometer escapement, power reserve indication and middle temperature error compensation. Gilt bronze "Anglaise" glazed four sides and top. Satiné silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. Blued steel "pear" hands. Notes Poole's Auxiliary Compensation.This is the first form of auxiliary compensation known to have been applied to a compensation balance.In its simplest form, which has been used in a large number of chronometers, it consists simply of two small screws carried upon rigid arms united to the cross-bar of the balance, and so adjusted as to meet the rims, near their roots, as they move outwards in low temperatures. The effective lengths of the latter (and accordingly, the motion of the weights which they carry) is thus reduced slightly below its normal amount. This action is made use of by adjusting the chronometer fitted with such abalance to keep correct time, say at 90° and 60°, which would normally cause it to have a considerably increased error at 30°. The action of the check screw, however, counteracts this.The practical effect of the device is then, to halve the middle temperature error between the two standard temperatures, and greatly to reduce the error which would normally be produced in low temperature by this adjustment. Balances of this pattern are simple to make, and their popularity ma


Antiquorum

Auctioneer:
Antiquorum

Date:
1999-10-23

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CHARLES FRODSHAM ROSEWOOD LIBRARY CLOCK Charles Frodsham, Clockmaker to The Queen, 84, Strand, AD F.M.S.Z, No. 1048. Made circa 1850. Extremely fine and rare, 8-day Read more…


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Date:
1998-06-20


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Date:
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Auctioneer:
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Date:
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Auctioneer:
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Date:
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Sold for:
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American Market Very Early Split-Seconds Chronograph Charles Frodsham, Ad. FMSZ, No. 03615 and J.E. Dent, Watchmaker to the Queen, No. 23140, the movement by Nicole Read more…


Auctioneer:
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Date:
2009-10-04


Sold for:
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"Eight Day Marine Chronometer" Charles Frodsham, "By Appointment to the Queen", 84 Strand, London, No. 5023. Made circa 1860. Fine and rare, 8-day going mahogany Read more…


Auctioneer:
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Date:
2006-10-15


Sold for:
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Charles Frodsham, 115 New Bond Street, London. Made in 1854. Very fine and rare giant gilt brass eight-day carriage clock with hour striking and repeating. Read more…


Auctioneer:
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Date:
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Sold for:
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“Victoria and Albert Royal Presentation Watch” Charles Frodsham, 84 Strand, London, No. 01736, Retailed by R.S. Garrard & Co, London. London Hallmarks for 1861-62. Very Read more…


Auctioneer:
Antiquorum

Date:
2007-05-13