Details
A lacquered-brass surveying clinometer,
by Negretti & Zambra, London, the arm with double bubble levels, the smaller arranged to fold at 90° to the arm, with tangent screw fine adjustment and clamp, the base with adjustable levelling screw -- 9in. (23cm.) long
by Negretti & Zambra, London, the arm with double bubble levels, the smaller arranged to fold at 90° to the arm, with tangent screw fine adjustment and clamp, the base with adjustable levelling screw -- 9in. (23cm.) long