Ebony framed sextant with polished brass limb, brass index arm, wooden handle and inlaid ivory plate in the crossbar in keystone shaped wooden case, by Louis Paschal Casella, London, England,1862-1868. Consists of ivory inlaid scale 121° (-5° to 140°), 20’ divisions with ivory vernier, pivoted magnifier, , tangent and clamping screw to the rear of the index arm and four filter shades (three red, one green). Fitted with threaded telescope and telescope (93 mm) erect image, telescope (185 mm) inverted image and sight tube (83 mm). Carries label for Agostinho de Souza Reves E Cia, Rua d' Alfandega, No. 30, Rio de Janeiro, Brazil. Case marked inside lid with trade card of E.M. Rocha and Comp, 56 rua da Assemblea, Rio de Janeiro.

Wooden framed sextant by Cassela, London, in fitted wooden case. 19th Century