This is a nice, well maintained fully working barograph by renowned manufacturers and retailers, Chadburns of Liverpool, circa 1910. The heavy walnut hardwood case has deep bevelled glass all round to the lift-off lid. The lacquered brass movement has the calibration adjustment screw in the middle of the base plate which is typical of the period.
A selection of weekly charts will be included together with a fresh bottle of recording ink, red or blue, and a re-printed copy of a pamphlet by Negretti and Zambra describing operating instructions and the interpretation of various chart recordings. 
370mm wide x 234mm deep x 190mm high.