A Rare Negretti & Zambra Recording Galvanometer. Early 20th Century
January 12, 2021
For sale is a fine and large and recording galvanometer by the noted maker Negretti & Zambra early 20. Comprising a galvanometer mechanism, recording drum and separate clockwork movement, all mounted on a heavy black marble slab. The unit is housed in a glazed mahogany case with lacquered brass fittings. The unit was used in combination with a separate sensor (not present) to record temperature (a pyrometer) and the brass top plate over the clockwork movement housing is inscribed Electrical Recording Pyrometer No. 1037A, 0 to 75 degrees F. Approximate dimensions of the case are 13.5 by 14 by 11.5 inches (34 by 36 by 29 cm) and weight is around 17 kilos. Overall condition is very good, with original lacquer to the brass parts and the clockwork mechanism in working order. However, please note that the galvanometer suspension wire is detached, wires connecting the movement to the outer mahogany case are disconnected and the wooden sides of the case with some shrinkage cracks (please refer to photos). Nevertheless, it is a handsome instrument that displays well. He comments in the catalogue description The quality of this instrument is outstanding, I love it. I have found such pieces exceedingly difficult to find. Please note that the photos form part of the description. Thank you for looking. The item “A Rare Negretti & Zambra Recording Galvanometer. Early 20th Century” is in sale since Monday, January 11, 2021. This item is in the category “Antiques\Science/Medicine\Scientific Instruments”. The seller is “amperesand” and is located in London. This item can’t be shipped, the buyer must pick up the item.