This antique barometer from Ross Ltd. Is a rare find for collectors of scientific instruments. The piece features a wooden frame and glass face, and was manufactured prior to 1930. The maker of the barometer is Ross Ltd. And it is an original piece, not a reproduction. This barometer would make a great addition to any collection of antique scientific instruments. I do not know if it works or how it works. I have had it for years. The glass is cracked. There are scratches and wear to the wood. I doubt that it works being so old. I know this is very RARE. My loss is your gain.