NEGRETTI & ZAMBRA
Fine Edwardian mahogany cased barograph with bevelled glass panels and central chart drawer.
Seven vacuum chambers linking the recording arm to the eight day revolving drum with lever escapement.
Original ink bottle and holder with dipper. Pen setting knob to the brass base plate inscribed Negretti & Zambra, London. C.1910
‘Negretti & Zambra’ were undoubtedly the most famous barograph and instrument makers of the day. The firm had premises at Hatton Garden, Cornhill, Regent Street and Fleet Street and were appointed ‘Instrument makers to her Majesty’.