NEGRETTI & ZAMBRA: A FINE EARLY 20TH CENTURY OAK CASED BAROGRAPH WITH THERMOMETER the mechanism with segmented aneroid chamber connected via a lacquered brass armature to an inked pointer for recording the change in barometric pressure on a rotating paper scale lined drum, with a silvered thermometer fitted to the brass plate, with ivorine plaque engraved NEGRETTI & ZAMBRA, LONDON, the case with five-panel hinged and glazed cover on rectangular base incorporating a drawer containing numerous spare charts, with a silvered plaque inscribed 'April Seventeenth 1937-1962' 35cm wide x 21cm high
NEGRETTI & ZAMBRA: A FINE EARLY 20TH CENTURY OAK CASED BAROGRAPH WITH THERMOMETER the mechanism with segmented aneroid chamber connected via a lacquered brass armature to an inked pointer for recording the change in barometric pressure on a rotating paper scale lined drum, with a silvered thermometer fitted to the brass plate, with ivorine plaque engraved NEGRETTI & ZAMBRA, LONDON, the case with five-panel hinged and glazed cover on rectangular base incorporating a drawer containing numerous spare charts, with a silvered plaque inscribed 'April Seventeenth 1937-1962' 35cm wide x 21cm high
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
