拍品专文
Probably from a level or theodolite.
细节
W. & T. GILBERT, London
A brass-cased compass box, with engraved silvered-dial and edge-bar needle, on mount -- 2¾in.(7.25cm.)diam.
A brass-cased compass box, with engraved silvered-dial and edge-bar needle, on mount -- 2¾in.(7.25cm.)diam.