An early 20th century barograph retailed by Sharman D Neill Optician, Belfast, the eight day clockwork recorder and eight drum atmosphere on a lacquered base fitted on an oak stand,(cover missing) 31cm long.
An early 20th century barograph retailed by Sharman D Neill Optician, Belfast, the eight day clockwork recorder and eight drum atmosphere on a lacquered base fitted on an oak stand,(cover missing) 31cm long.
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