Nicely finished and unusually slim pocket chronometer by this famous firm, with provenance.
Engine-turned gold case hallmarked 1844, casemaker FM (Frederick Matthews, Clerkenwell), the rear cover with discreet crest and motto: CERVUS NON SERVIS (a stag not enslaved) as used by the Goddard Family. Three-quarter plate fusee movement jewelled to the fusee, with cap jewels on balance (diamond) and escape. Earnshaw-type spring detent escapement in what would usually be a duplex frame, necessitating an unusual planting of the detent. Compensation balance, spiral balance spring. Perfect signed enamel dial, blued-steel hands. 48.5 mm diameter and only 13 mm deep, including glass. Together with velvet and silk lined box.
Thomas Frederick Cooper, London watchmaker with a deserved reputation for his fine duplex and lever watches, especially his exports to America. This is one of very few I have seen with a chronometer escapement.
NB: Planting of the detent usually necessitated a purposely designed frame, but occasionally one encounters detent escapements in English work that have been planted in ordinary frames, presumably where slimness was a prime requirement, such as here - one can only admire the ingenuity of the escapement makers.
Light engine-turning showing some signs of wear, otherwise a rare form of chronometer in very good original condition, especially the escapement which looks as good as the day it was made. Cleaned guaranteed.
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