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Jason Clarke Antiques
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Window Bracket Thermometer by Negretti & Zambra
For sale, an Edwardian self registering maximum minimum window bracket thermometer by Negretti & Zambra.
The thermometer is comprised of an oak base with two central holes for it to be fitted to the wall. Two black painted metal mounts are attached to the front of the backboard which serve to hold an opaline glass painted scale plate and allow it to be angled according to the owner’s requirements. The minimum theremometer reads from -20 to 140 Fahrenheit and the maximum from -20 to 130, both containing a small magnetic pin in order to record the highest or lowest point of the reading at any given point. These can be reset to level by the use of a weak magnet when required.
This scarce pattern was advertised by Negretti & Zambra from the 1870’s through to the early 1900s whereafter they cease to appear in their main catalogues. An 1890’s advertisement states, “The outside window bracket thermometer enables the observer to read the highest, lowest and present temperatures from inside the house”.
Negretti & Zambra were a leading name in the production of meteorological and scientific instruments and had a company history dating back to 1850 although their parents were amongst those Italian emigres that bolstered the British meteorological instrument making industry at the turn of the century.
Throughout their long and esteemed history they exhibited at British and international industrial fairs and became makers to both Queen Victoria and Edward VII. Owing to changes in the business, the firm ceased the public retailing of scientific instruments sometime around the late 1960’s and continued with a focus on the aviation industry in numerous guises until its eventual liquidation in the year 2000. They are today perhaps the most collected of the scientific instrument firms which bears testament to the quality of their work.
A great looking and interesting example of a max min thermometer and one that is seldom seen.
Circa 1905
SellerJason Clarke Antiques
View all stock from
Jason Clarke Antiques
Private dealer
By appointment only
Newbury
Berkshire
Tel : 07815 046645
Non UK callers : +44 7815 046645
The thermometer is comprised of an oak base with two central holes for it to be fitted to the wall. Two black painted metal mounts are attached to the front of the backboard which serve to hold an opaline glass painted scale plate and allow it to be angled according to the owner’s requirements. The minimum theremometer reads from -20 to 140 Fahrenheit and the maximum from -20 to 130, both containing a small magnetic pin in order to record the highest or lowest point of the reading at any given point. These can be reset to level by the use of a weak magnet when required.
This scarce pattern was advertised by Negretti & Zambra from the 1870’s through to the early 1900s whereafter they cease to appear in their main catalogues. An 1890’s advertisement states, “The outside window bracket thermometer enables the observer to read the highest, lowest and present temperatures from inside the house”.
Negretti & Zambra were a leading name in the production of meteorological and scientific instruments and had a company history dating back to 1850 although their parents were amongst those Italian emigres that bolstered the British meteorological instrument making industry at the turn of the century.
Throughout their long and esteemed history they exhibited at British and international industrial fairs and became makers to both Queen Victoria and Edward VII. Owing to changes in the business, the firm ceased the public retailing of scientific instruments sometime around the late 1960’s and continued with a focus on the aviation industry in numerous guises until its eventual liquidation in the year 2000. They are today perhaps the most collected of the scientific instrument firms which bears testament to the quality of their work.
A great looking and interesting example of a max min thermometer and one that is seldom seen.
Circa 1905
Price The price has been listed in British Pounds.
Conversion rates as of 11/DEC/2025. Euro & Dollar prices will vary and should only be used as a guide.
Always confirm final price with dealer. Sold
Category Vintage Technology
Period Edwardian Antiques
Origin English
Maker Negretti & Zambra
Item code as542a484
Status Sold
£0 
$0.00 
€0.00 
$
€
Conversion rates as of 11/DEC/2025. Euro & Dollar prices will vary and should only be used as a guide.
Always confirm final price with dealer. Sold
View all stock from
Jason Clarke Antiques
Private dealerBy appointment only
Newbury
Berkshire
Tel : 07815 046645
Non UK callers : +44 7815 046645
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