Kembery Antique Clocks Ltd has dated this piece to the 1850s.

J H Allis of Bristol is documented in A J Moores' Clockmakers of Bristol' book
as born in 1817 and worked until 1876. He made precision clocks and exhibited at the Great Exhibition in 1851.
In 1851 he is noted as a chronometer maker. Height 6ft 3 " / 192cms.
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Kembery Antique Clocks Ltd has dated this piece to the 1850s.
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