This Hampton Nautical solid Brass Theodolite 10'' is beautifully detailed, functional, and calibrated. Theodolites are still used today for ultra high precision optical alignment and measurement. --The azimuth and elevation axes can be read on a vernier scale with the aid of built-in magnifiers. Both axes have slow motion controls and the telescope can plunge and reverse to reduce bearing errors. With a magnetic compass mounted on top, the azimuth axis has a second spirit level mounted on the telescope with a mirror to assist in leveling while the telescope utilizes precision optics and has a brass lens cover. The theodolite's 22-power non-inverting telescope has two focusing adjustments; one for the precision reticule focus and another for focusing the target. ----Brass theodolite is primarily for nautical decoration and not manufactured for use as an actual measurement instrument---- Solid brass housing and body-- Functional compass and telescope-- Glass optics for clear viewing-- Modern design on a classic nautical instrument--