Negretti & Zambra, London rare gilt-brass weather forete...

Negretti & Zambra, London rare gilt-brass weather foreteller pocket barometer, 2" circular silvered register calibrated in barometric inches to the circumference around an inner ring adjustable for DIRECTION OF WIND via the bezel against annotations provided as compass bearings as well as DEAD CALM, the central disc rotated via a knurled crown within the suspension loop for lining up the blued steel pointer against a scale with corrections for altitude, pierced with three sectors annotated FALL, STEADY and RISE revealing letter codes to the fixed plate behind, inscribed PATENT 6276/15 and signed NEGRETTI & ZAMBRA, the cylindrical case with altimeter scale to circumference, 2" diameter; with green velvet lined maroon Morocco leather covered protective case fitted with ivorine repeat sector scale to the inside of the lid ** From the David Read Collection

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