An oak cased aneroid barograph, Negretti & Zambra, London, mid 20th century, with ten segment aneroid chamber connected via lacquered brass armature to an inked pointer for recording barometric pressure variation onto the paper scale lined clockwork rotating drum, the baseplate signed NEGRETTI & ZAMBRA, LONDON under oak framed five glass cover, on moulded base and squab feet, 35cm (14.75ins) wide.
An oak cased aneroid barograph, Negretti & Zambra, London, mid 20th century, with ten segment aneroid chamber connected via lacquered brass armature to an inked pointer for recording barometric pressure variation onto the paper scale lined clockwork rotating drum, the baseplate signed NEGRETTI & ZAMBRA, LONDON under oak framed five glass cover, on moulded base and squab feet, 35cm (14.75ins) wide.
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
