Kembery Antique Clocks Ltd has dated this piece to the 1850s.
A verge fusee mechanism signed by maker 'Raper, Thirsk, 71994'. Silver hallmarks to the case for London 1844. Sydney Raper of Thirsk is recorded in Loomes 'Watchmakers and Clockmakers of the World' book as working 1840-1851.
Case Width 48 mm.
Kembery Antique Clocks Ltd has dated this piece to the 1850s.
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