Great patina looks to be copper or bronze, I don’t think it is brass?? The item “French made, B. K. Elliott Holosteric Barometer Pittsburgh -Cleveland” is in sale since Saturday, September 28, 2019. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “pidco-dav” and is located in North Ridgeville, Ohio. This item can be shipped to United States.
