A French oxidised and lacquered brass surveying level, with graduated bubble level mounted over compass box, on telescope with rack and pinion focusing, dust cap, mounted on horizontal circle, with clamp, on four screw tripod mount, in case - 12¼in.wide

細節
A French oxidised and lacquered brass surveying level, with graduated bubble level mounted over compass box, on telescope with rack and pinion focusing, dust cap, mounted on horizontal circle, with clamp, on four screw tripod mount, in case - 12¼in.wide
see illustration