Callaghan & Co. Aneroid Barometer

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Exceptional aneroid barometer by Callaghan & Co. Rare form with knob at bottom to adjust the set hand. Very fine quality. Curved mercury thermometer at bottom of dial. Address reads "23a New Bond St, corner of Conduit St, London."

Circa 1870.

Measures 5" diameter by 2.75" depth. Fine working condition.