Shackladys Antiques has dated this piece to the 1920s.
The ink trace, or barogram, on the recording paper, is a visual record of changes in pressure.

The aneroid barometer mechanism has nine stacked vacuum capsules and utilises a gate suspension, a refinement developed to improve sensitivity.
Dimensions
Height 6.5 Inches
Width 10.5 Inches
Depth 6 Inches
Shackladys Antiques has dated this piece to the 1920s.
You can view the stock and full dealer information on the Shackladys Antiques Profile Page
Shackladys Antiques is a registered member of LAPADA