Appears never used, my father owned, don’t know much about it myself. I put barometer in a plastic sealed bag, pressed on it and the needle moved- so it iis working.The item “Chancellor, Dublin Compensated Pocket Barometer” is in sale since Saturday, January 31, 2015. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “whee1075″ and is located in Potlatch, Idaho. This item can be shipped to United States.