A black enamelled brass 'Cercle Hydrographique', signed Lorieux, Le Petit Sucr Paris No. 449 with silvered scale divided 180 -0 -180 the spoked frame with adjustable telescope mounting socket, mirrors and shade mounting, the index arm stamped SH 246 -- 4 7/8in (12.4cm) radius with vernier scale and magnifier, tangent screw fine adjustment, folding mahogany handle, two telescopes and other accessories. Makers trade label and other items in fitted mahogany case -- 12¾in. (31.4cm.) wide