Quintant

The quintant has a black-lacquered brass triangle-pattern frame with a wooden handle. The tangent screw and clamping screw are positioned on the back of the index arm. The instrument has four grey shades and three grey horizon shades. Index-glass adjustment is made by a screw and on the horizon glass by capstan screws, square-headed screws and a detached key.

Attached to the quintant is a magnifier on a 77mm swivelling arm. There is also a threaded telescope bracket in two parts, fitted for correcting collimation error. It has perpendicular adjustment made by a rising-piece and a milled knob. The telescope is 183 mm in length with an inverted image and four cross wires. An extra drawtube is 79 mm long with an erect image and two parallel cross wires. A second telescope is 82 mm long with an erect image. Accompanying the quintant is a sight-tube, which is 78 mm in length, two shaded eyepieces in red and grey, an adjusting key, an adjusting pin, and a magnifying glass in a horn cover. The upper screw holding the handle is broken.

The instrument has a polished brass limb with inlaid silver scale from -5° to 165° by 10 arcminutes, measuring to 146°. The quintant has a silver vernier measuring to 10 arcseconds, with zero at the right.

The quintant is contained in a square fitted wooden box, which has been repaired, with a brass plate on the lid marked, ‘H. W. W. Hope’.

The Army and Navy Co-operative Society Ltd were retailers in London. It is likely that they obtained their quintants from a London manufacturer like Elliott Brothers, who like the Society were situated in the Strand, or from Henry Hughes and Son or Heath and Co.
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