I believe it’s in a brass. It may be ‘ gilt ‘, which would be brass with a gold wash over. Housed in a unique aqua painted wooden house shaped stand. Age discolor on face surface, and patina on gilt case.
1830 by the optician john lizars (1810-1879) in. They made products after he passed. I believe it’s from the.
LIZARS GILT POCKET ALTIMETER BAROMETER GLASGOW EDINBURGH ETC IN STAND” is in sale since Sunday, September 21, 2014. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “toysfromroy” and is located in Kailua Kona, Hawaii. This item can be shipped worldwide.