A FINE EARLY 19TH CENTURY EBONY AND BRASS OCTANT, By BATE LONDON , with incised ivory scale, telescope mounting socket, seven shades, mirrors, the index arm with vernier, tangent-screw fine adjustment and clamp, in keystone shaped case-- 11¼in. (28.5cm.) wide (2)
A FINE EARLY 19TH CENTURY EBONY AND BRASS OCTANT, By BATE LONDON , with incised ivory scale, telescope mounting socket, seven shades, mirrors, the index arm with vernier, tangent-screw fine adjustment and clamp, in keystone shaped case-- 11¼in. (28.5cm.) wide (2)
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