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Details
A mid 19th Century 9½ in. radius vernier octant by Young & Son
the ebony frame with ivory scale divided 2½°- 0°- 105°, signed on inset ivory in the cross-bar Young & Son, Glasgow, brass index arm with vernier fine screw adjustment, telescope (incomplete), two mirrors and three shades, the reverse with brass pin feet, contained within mahogany keystone box with brass securing hooks -- 13in. (33cm.) wide
See illustration
the ebony frame with ivory scale divided 2½°- 0°- 105°, signed on inset ivory in the cross-bar Young & Son, Glasgow, brass index arm with vernier fine screw adjustment, telescope (incomplete), two mirrors and three shades, the reverse with brass pin feet, contained within mahogany keystone box with brass securing hooks -- 13in. (33cm.) wide
See illustration