Original U.S. WWII Navy Marked Brass Compensated Aneroid Barometer by Short & Mason of London Brunswick Guns marked with "N" in a

marked with "N" in a triangle

issued not long after the war started

On the night of 18/19 November

M40 style with the addition of an embossed horizontal "bead" positioned at the apex of the front and rear visors and crown

Although over 12

Original U.S. WWII Navy Marked Brass Compensated Aneroid Barometer by Short & Mason of London Brunswick Guns marked with "N" in aOriginal Item: Only One Available. A barometer is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries. An aneroid barometer is an instrument used for measuring air pressure as a method that does not involve