SOLD This is a late 19th century pocket miniature aneroid barometer made by the well-known scientific instruments maker Negretti & Zambra from London. The silver barometer dial goes from 26-31 in/mercury adjusted by a bezell. The fine calibration is made in the back with a small screw. The body of the barometer is made of brass and is in excellent condition. Dimensions: 48 mm diameter and 18mm height.