The world's finest barograph is housed in a hinged, solid mahogany case with glass sides to provide easy access to the chart drum. An eight-diaphragm bellows provide maximum sensitivity and precision. Quartz movement requires no winding and is more accurate than key-wound movements.
Barograph readings are marked with a felt tip pen which lasts 6 to 9 months. Ships with one-year supply of weekly charts, one felt tip pen, dampening fluid and AA battery.