Large 19th Century brass-cased aneroid barometer.

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Reference
6207
Fine and unusually large 19th Century 8-inch [210 mm] diameter brass cased aneroid barometer. The well-engraved silvered brass dial with exposed movement bearing twin curved thermometers - alcohol Réaumur and Centigrade, and mercury Fahrenheit, protected by bevelled plate glass. The case profile exaggeratedly dished.
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Year c 1880