The Miner's Compass is a heavy solid brass reproduction of a handheld European Miner's compass. A front sight folds up, and the window in the lid has a scribed line to serve as a rear sight. The compass can determine both the magnetic heading of an object, as well as its angle of elevation or declination. A pendulous arm can read the vertical angle of an object of elevation or declination. The inclination scale is printed mirror imaged so that when taking a elevation or declination measurement, the lid with the internal mirror can be placed in the 45 degree position, and the angle can be read while simultaneously viewing the object. The top of the compass has a Natural Sine table to assist in trigonometric calculations in the field. The compass rose is marked in degrees and has the original old markings. The compass measures 3 1/8" in diameter, 1 3/8 inches thick, and weighs a very solid 1 pound, 3 ounces. It comes with a beautiful lined hardwood case.