A MID 19TH-CENTURY LACQUERED BRASS THEODOLITE by Ertel & Sohn; the telescope with rack and pinion focusing, cross-wires and lens dust cap, mounted with a trunnion on the twin vertical supports with level and cross-bubble, the 4¾in (12cm) diam vertical circle finely divided on the silvered scale with additional graduated level, verniers and magnifier, the horizontal circle with two verniers, reflecting shades and magnifiers, signed Ertel & Sohn in München on the outer horizontal rim, on three-screw tripod mounting in fruitwood case -- 13¼in (33.7cm) high

細節

A MID 19TH-CENTURY LACQUERED BRASS THEODOLITE by Ertel & Sohn; the telescope with rack and pinion focusing, cross-wires and lens dust cap, mounted with a trunnion on the twin vertical supports with level and cross-bubble, the 4¾in (12cm) diam vertical circle finely divided on the silvered scale with additional graduated level, verniers and magnifier, the horizontal circle with two verniers, reflecting shades and magnifiers, signed Ertel & Sohn in München on the outer horizontal rim, on three-screw tripod mounting in fruitwood case -- 13¼in (33.7cm) high