Brass Miner's Dial / Theodolite by Newton

Description:

Brass Miner's Dial / Theodolite by Newton, England, with 5 1/2-inch diameter silvered dial signed Newton late Wilton, St. Day, Cornwall, circumference scale and needle ring graduated 0-360 with vertical divisions on inner rim, steel needle, brass central hub with vernier operated from staff mount on the underside, brass lid, bubble-levels, interchangeable slide-on sights and vertical half-circle with 7 1/2-inch lg. telescope with extension eyepiece and two bubble-levels mounted on arm with anodized vernier, tangent-screw adjustment and clamp - ht. 12 1/2 in. , in fitted dovetailed mahogany case with maker's label of E.T. Newton & Son, (Late Wilton),Opticians, Mathematical Instruments, Chemical and Scientific Apparatus Manufacturers, Cross St., Cambridge, Cornwall, England; and tripod.
Estimate $1,000-1,500

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