SIB0223 3” Solid Stallone Brass Stand Surveying Compass

3” Solid Solid Brass Stand STALLONE-INDIA Surveying Compass

This compass is a heavy solid brass reproduction of an antique stand-surveying compass. The side of the compass has
an adjustable spirit level and the compass is mounted on a stand with three independently adjustable feet. The compass
is free to rotate in azimuth on the stand. The inside of the lid has a mirror with a vertical line inscribed for use as both a
rear sight, as well as to assist in reading the heading. A magnifying lens built into the front sight can also be used to read
the compass heading. There is a slotted screw on the outside of the case that turns a gear that rotates the entire compass
rose to adjust your local magnetic declination angle (the difference between true north and magnetic north). Closing the
compass lid moves a needle lift mechanism that protects the jewel bearing when transporting the compass. The top of
the lid contains a natural sine table, stands 3 ½ inches (8.9 cm) tall with the lid closed, In practice, the spirit level is
calibrated by setting the compass on a relatively lever surface and adjusting the spirit level until the bubble reads the same
distance from center when the compass is rotated 180-degrees on its stand. With the spirit level calibrated, the three
threaded feet are adjusted so that the spirit level is centered for any azimuth. When an object is sighted through the sights,
its magnetic heading can be determined from the main compass rose, and its heading with respect to true north can be
read from the outer azimuth ring.
Size: 3 1/8 inches (7.9 cm dia
Weight: 0.680 kg.
PACKAGING SIZE DETAIL
18x18x12 centimeter, single pcs cardboard box packaging