The plate on the back indicates it was patented in 1914. It is unique in that the user sets the altitude of his location to obtain an accurate reading. The body of the instrument appears to be copper but there are indications that it was brass plated. It is in good shape and I have noticed changes in the readings over the past several days. There is minor cracking of the paint on the dial. It is 5 1/8″ in diameter and 2 1/2″ deep.

Tycos Rochester New York High Altitude Pocket Barometer Altimeter. Altimeter pictured is what you will receive.

Peoria Malleable Castings Altitude Barometer Altimeter Climbing Made In England. Leather or sharkskin case. Rare and beautifully piece. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “10lakes66″ and is located in this country: US. This item can be shipped to United States.

Antique altitude meter wallace & tiernan products model fa 113. Awesome instrument for air temp and relative humidity correction for altitude. Serial number wp 41056 and model fa 113. Box shows some wear but still looks cool! Measures 7 x 6 x 4. The item “Antique altitude meter wallace & tiernan products model fa 113″ is in sale since Thursday, July 29, 2021. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “greenvelvetgrass” and is located in Broken Arrow, Oklahoma. This item can be shipped to United States.

Antique aneroid barometer by Short & Mason for use in higher elevations. Dial range goes down to 26 and there is also an altitude compensation dial on back. Nice brass case with silvered dial, replaced set hand. Great overall and working condition. Measures 5-1/4″ diameter by 2-1/2″ deep. Please check out our other items and be sure to add Paul Madden Antiques to your favorites list as we are posting new items every week. PAUL MADDEN ANTIQUES has been an active marketplace for over 40 years with 3 generations of Maddens. We offer a large inventory of Americana in great variety and have been an important source for collectors, decorators, and museums. We offer for sale American folk art, antique Nantucket Lightship baskets, Cape Cod & Islands artwork, and a vast inventory marine related items. We guarantee everything we sell. The item “Antique Short & Mason High Altitude Aneroid Barometer” is in sale since Wednesday, March 10, 2021. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “paulmaddenantiques” and is located in Sandwich, Massachusetts. This item can be shipped worldwide.

Tool Type: Pocket barometer. Brand: Short & Mason. Marks: COMPENSATED FOR TEMPERATURE Tycos SHORT & MASON LONDON MADE IN GT BRITAIN. Some light finish wear. Comes with the pictured pouch, box and instructions. Snap on case is broken. Measurements: 2″ diameter, 5/8″ thick. 20% of sales go to benefit the Davistown Museum. MULTIPLE ITEMS: PLEASE request an invoice before paying! If you have any questions about these items, please ask. The photos ARE of the actual items offered unless otherwise noted and should be used as indications of the items’ conditions. If I have not described an aspect of the item, please do not make assumptions–send me a message and ask, and I will do my best to answer your question as thoroughly as I can. The item “Antique Tycos Short & Mason 2021 London Pocket Altitude Barometer in Box with Case” is in sale since Saturday, June 30, 2018. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “siliconvalet” and is located in Liberty, Maine. This item can be shipped to United States.

Tool Type: Pocket barometer. Brand: Short & Mason. Marks: COMPENSATED FOR TEMPERATURE Tycos SHORT & MASON LONDON MADE IN GT BRITAIN. Some light finish wear. Comes with the pictured pouch, box and instructions. Snap on case is broken. Measurements: 2″ diameter, 5/8″ thick. 20% of sales go to benefit the Davistown Museum. MULTIPLE ITEMS: PLEASE request an invoice before paying! If you have any questions about these items, please ask. The photos ARE of the actual items offered unless otherwise noted and should be used as indications of the items’ conditions. If I have not described an aspect of the item, please do not make assumptions–send me a message and ask, and I will do my best to answer your question as thoroughly as I can. The item “Antique Tycos Short & Mason 2021 London Pocket Altitude Barometer in Box with Case” is in sale since Sunday, April 29, 2018. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “siliconvalet” and is located in Liberty, Maine. This item can be shipped to United States.