Westport High Sensitivity Barometer All instruments in the Westport Collection are crafted of high quality polished brass and finished with a protective lacquer coating. This is a double capsule expanded scale barometer with greater sensitivity and accuracy than any traditional marine barometer currently available. The scale ranges from to instead of the traditional scale of to in Hg. A numbered certificate of accuracy is included. The movement is calibrated for altitudes to 1,500? above sea level.4-3/4"Base: 5-7/8"Depth: 1-1/2"Wt. 14                               
 
Large Westport High Sensitivity Barometer: Polished brass, finished with a protective lacquer coating. Provided with complete instructions, mounting hardware,Limited lifetime warranty,