Franzi Bourdon barometer - Brass - Marine barometer

This object is a vintage aneroid barometer, a scientific instrument designed to measure atmospheric pressure without the use of liquids such as mercury.
Origins of the technology: The aneroid barometer was refined in the mid-19th century by inventors such as the French Bourdon. Unlike mercury models (or Torricelli barometers), this uses a sealed flexible metal capsule that contracts or expands in response to changes in air pressure.
Evolution of style: Similar pieces to the one in the photo, often made of metal such as brass, became common decorative and navigational items from the early 20th century to the 1960s. Historic brands renowned for these instruments include the German Lufft (active since 1881) and Schatz.
Dial features: The inscriptions you see ("Stormy", "Rain", "Change", "Fair", "Very Dry") indicate the weather forecasts associated with the different pressure levels measured in inches of mercury (inHg) or millibars (mb/hPa).
The item features a design reminiscent of vintage nautical instruments, with a column-like structure and an upper suspension ring that allowed it to rest on a desk as well as the possibility of mounting. The exposed mechanism at the center is a decorative feature typical of some mid-century modern designs, intended to showcase the precision of the internal movement.
The photos are an integral part of the description.
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