The elegant Anniversary Barometer is highly reliable and houses a accurate double diaphragm German aneroid movement that is visible through the open dial. It has a 5.25" dial, a 7" base and is 3.5" deep. It displays both of the barometric scales; inches of mercury and millibars. The movement is temperature compensated and calibrated for altitudes up to 3500'' above sea level and it weighs 7 lbs 2.5 oz. It was created from solid, forged brass that is hand polished and lacquered. It includes the finest German movements, dials, hands and components available in the world. The distinctive dial of this item is intricately etched to create a subtle but rich pattern. It is labeled with a unique serial number and comes with complete instructions, mounting hardware and a limited lifetime warranty.