This is a very neat old pocket barometer and altimeter. The body is brass with a beveled glass crystal. Barometer goes from 21-31 and altimeter goes from 0 to 10,000 feet. The outer bezel turns for adjusting the altimeter numbers. This piece does not appear to be working, I see no movement of the needle. May need a cleaning or tweaking. Back has an adjustment screw for the needle setting. Measures 2 in diameter. The face is marked – Compensated, Made In England. An interesting antique pocket barometer. The item “Antique english pocket barometer” is in sale since Thursday, March 30, 2017. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “keely2040″ and is located in Spring Lake, Michigan. This item can be shipped to United States.