Richard Twort is located in Weston-super-Mare, UK
Barograph & Thermograph Combined Instrument by Negretti & Zambra c.1955 England
A commercial version of a combined barograph & thermograph by Negretti & Zambra. Set into a metal case with a glass panel at the front & circular grill to the side (allowing air to circulate around the bimetallic temperature coil). This instrument from the 1950’s is in working condition & the barograph movement comprises of the diaphragms with the separate section at the base which proved to be more accurate in tests – see extract from Negretti’s 1950 catalogue. The movement also has the pen arms engraved with ‘Thermograph’ & ‘Barograph’ & each linked to a gate suspension. The pen arms move freely past each other using ‘birdsmouth pen nibs. A nice working instrument.
Richard Twort has clarified that the Barograph & Thermograph Combined Instrument by Negretti & Zambra c.1955 England (LA125110) is genuinely of the period declared with the date/period of manufacture being c.1955
Good condition for year.
Please contact Richard Twort for delivery of this item.
This Barograph & Thermograph Combined Instrument by Negretti & Zambra c.1955 England is located in Weston-super-Mare, UK