Set in a re-polished large mahogany case with radiused corners and bevelled glass, this imposing barograph has an unusual movement comprising 2 large diaphragms. The brass base to the movement is engraved Standley Belcher and Mason Ltd, ‘Simplex’ Barograph Reg No. 468791. A selection of charts and a fresh bottle of ink supplied. Circa 1935230mm H x 380mm W x 235mm D.