A oak cased barograph by Negretti & Zambra, London
Having a hinged bevelled glazed case housing a seven-tier vacuum, lacquered brass furniture and drum, the key-wound movement with lever platform escapement, over ivorien plaque and a chart drawer,

Negretti & Zambra

The firm Negretti and Zambra (active 1850 – c. 1999) was a producer of scientific (philosophical) and optical instruments and also operated a photographic studio based in London, England. Henry Negretti (1818–1879) and Joseph Zambra (1822–1897) formed a partnership in 1850, thereby founding the firm which would eventually be appointed opticians and scientific instrument makers to Her Majesty Queen Victoria,

Dimensions

Height 8.5 Inches

Width 14 Inches

Depth 8.5 Inches