A beautifully compact marine Barograph which is ideal for use whilst sailing. It has a damper device fitted to even out the motion of the boat so that a more stable reading can be obtained. Equally suitable at home where space may be a consideration. The classically designed natural coloured wooden case has bevelled glass windows with a brass carrying handle. The mechanism has 4 capsules, precision +-0.5hPa. Weekly charts (50 supplied ref: 11HPA) along with Felt Tip Pen and Battery (1.5V Type LR6). Please allow approximately 3 weeks for delivery product built to order. A barograph is a recording aneroid barometer used to measure pressure. The pointer in an aneroid barometer is replaced with a pen. It produces paper chart called a barogram that records the barometric pressure over time. This model records the pressure for one week on the chart Marine barographs (used on ships) include a damping device, this evens out the motion of the ship so that a more stable reading can be obtained. Perfect gift for someone special with an interest in sailing.