Shackladys Antiques has dated this piece to the 1910s.
The ink trace, or barogram, on the recording paper is a visual record of changes in pressure.

The aneroid barometer mechanism has ten stacked vacuum capsules and utilises a gate suspension, a refinement developed to improve sensitivity. The barograph has its original glass ink bottle recessed into the case. With hinged lid with brass carry handle.
Dimensions
Height 8 Inches
Width 13 Inches
Depth 6.5 Inches
Shackladys Antiques has dated this piece to the 1910s.
You can view the stock and full dealer information on the Shackladys Antiques Profile Page
Shackladys Antiques is a registered member of LAPADA