Alidade Theodolite Compass for Measuring Vertical and Horizontal Angles. Looks antique.
This instrument consists of an adjustable 7" to 8" telescope with working lens (2-3x), a level, a compass, graduated numbering, swivel base and 3 adjustable legs.
Overall height is approx. 7" tall. Solid brass base is 4-3/4" wide.
Replica of a functional instrument used for topographical surveying, mapping, leveling and plane table surveying.
For the nautical person in home or office.