Timeless stately appeal for your bulkhead or wall! Light, strong and durable, this open-dial barometer is a holosteric or aneroid type that measures atmospheric pressures mechanically without the use of liquids. The movement is temperature compensated, fully adjustable with inch and millibar scales, and is calibrated for altitudes to 3,500 feet above sea level. Made with a brass maintenance-free, ultra-hard protective coating, this weather-resistant clock wont tarnish—a welcome benefit for your boat!Dimensions: Dial 3 1/5"; Base 4 3/4"; Depth 2 1/8"Materials: Maintenance-free brass finish with ultra-hard protective coatingGuaranteed not to tarnish or scratchWeather resistantBeveled crystal glassTraditional porthole front-opening bezelMounting methods for boat or shoreLifetime warranty on finish and movement