拍品 193
193
A fine lacquered brass surveying level, signed Troughton & Simms London with trade label Troughton & Simms Opticians and Mathematical Instrument makers to the honourable board of Ordanance LONDON, with graduted bubble, cross bubble, rack and pinion focusing, dust cover, ray shades, extention eyepiec, over compass box, on detachable four screw tripod mount in fitted mahogany case with accessories, 19th Century - 15¾in wide (2)

細節
A fine lacquered brass surveying level, signed Troughton & Simms London with trade label Troughton & Simms Opticians and Mathematical Instrument makers to the honourable board of Ordanance LONDON, with graduted bubble, cross bubble, rack and pinion focusing, dust cover, ray shades, extention eyepiec, over compass box, on detachable four screw tripod mount in fitted mahogany case with accessories, 19th Century - 15¾in wide (2)