細節
TROUGHTON & SIMMS, London
A brass surveying level, with spirit-level, ray-shade and rack-and-pinion focusing, the limb with compass, on four-screw tripod mount, in mahogany case -- 20 3/8in.(52.7cm.)wide
A brass surveying level, with spirit-level, ray-shade and rack-and-pinion focusing, the limb with compass, on four-screw tripod mount, in mahogany case -- 20 3/8in.(52.7cm.)wide