Good example of vintage dash mount small barometer made by the well-known scientific instruments maker Negretti & Zambra from London. The barometer dial goes from 26-31 in/mercury and comes with a nice domed glass. The fine calibration is made in the back with a small screw. The body of the barometer is made of nickel covered brass and is in excellent condition. Dimensions: 80 mm diameter and 34 mm height.